our nbc news exclusive. a mississippi man reported missing turns out he was hit and killed by a police car. why didn't they tell his mother for six months what she is demanding. and remembering matthew perry. the beloved "friends" star dying tragically at 54. new details about his final hours. >> announcer: this is nbc "nightly news" with lester holt good evening tonight much of the world is holding its breath, watching israel's ground operation against hamas in gaza unfold and wondering whether it could spread to other parts of the region tonight the country's prime minister rejecting calls for a ceasefire. benjamin netanyahu saying "we cannot give up the fight." his comments coming on the same day we learned an israeli soldier held by hamas has been rescued by israeli forces the concern for the fate of other hostages taken from inside israel is building as the ground war intensifies. hamas playing to those fears, releasing a new propaganda video showing some of the hostages it's believed to hold. the war, the civilian toll in gaza, the grim new reports of atrocities suffered by israelis during the october 7th terror attack, all playing out against an increasingly volatile world stage, generating a wave of hate, from jewish passengers sought out at an airport to antisemitic threats on college campuses here at home. we're covering it all tonight, starting with richard engel. >> reporter: this evening in tel aviv the families of israeli hostages were gathered to pressure the government not to forget their loved ones amid the fury to attack hamas elie's daughter liri is a soldier kidnapped from a watch tower at kibbutz nahal oz all of the guards were women. hamas killed 12 of them and kidnapped six or seven that's liri in the glasses. >> now i receive a message that the army released one girls from nahal oz. i hope that it's my daughter i hope hello. >> reporter: elie checks to see if maybe the rescued soldier is liri not tonight. >> it's not my daughter but she was with liri together >> reporter: so how does that make you feel >> make me happy even is not my daughter, but it's make me happy. >> reporter: the rescued hostage is liri's friend, private ori megidish, captured from the watch tower and freed by israeli troops carrying out the ground offensive in gaza last night israel says she's doing well medically and has met with her family but hamas has plenty more hostages in gaza. israel tonight raising their estimate to 239, including 33 children. and hamas is taunting israel with them, releasing a video today of three israeli captives speaking under duress the woman on the right is lena trupanov we met netta, a friend of the trupanov family she's speaking for them because everyone in the family was killed or kidnapped by hamas. how do you watch this war and watch all those explosions and not think they might be underground under one of those bombs >> i think about it. and we saw that lena is alive now, and this is the reason we want her back now >> reporter: israeli prime minister netanyahu under fire for not taking responsibility for being unprepared for hamas's surprise attack, says there will be no ceasefire, that israel must retaliate for the 1,400 israelis killed. >> just as the united states would not agree to a ceasefire after the bombing of pearl harbor or after the terrorist attack of 9/11, israel will not agree to a cessation of hostilities with hamas after the horrific attacks of october 7th. this is a time for war. >> reporter: in gaza more than 2 million civilians are suffering because of a war they didn't start, can't escape and which is escalating by the day. according to the health ministry run by hamas, more than 8,000 palestinians have been killed so far. hospitals have become refugee centers for the newly homeless "they destroyed our house on top of us," this man screams israel says there's a safe haven in the south. but it's bombing in southern gaza too. and the roads to get there aren't safe. today an israeli tank fired on a car traveling on the main highway. witnesses tell us there were children inside the israeli military wouldn't comment about the incident this war is only three weeks old, and it's hard to see much but suffering ahead. >> and richard, there are also new concerns about this war escalating with a defense official telling nbc news there's been another rocket attack on u.s. forces where and under what circumstances? >> reporter: so it was another rocket attack, this time in iraq. there were no american casualties but it comes just a few days after u.s. troops retaliated against similar iranian-backed militias in the region so it seems they are not backing down lester >> richard engel tonight, thank you we have new details in the brutality of the initial hamas terror attack but as israel presses its military campaign deeper, there are questions about the future of all this here's raf sanchez >> reporter: tonight a chilling reminder of the brutality of hamas's terror attack. israel announcing 23-year-old shani louk, last seen in this video being carried into gaza by hamas terrorists, has been found dead. israel's president said she was beheaded. her mom tonight saying, "this is not an act of war. this is just pure terror, cruel and brutal." shani was one of more than 250 young israelis murdered by hamas at the supernova music festival many of them tried to escape along road 232, now referred to in israel as the road of death. israeli civilians fleeing from the music festival reached this bomb shelter they thought they'd be safe here. but israel's military says a hamas terrorist threw a grenade inside and it turned into a death trap as israeli forces push deeper into gaza, their goal is to topple hamas polls before the terror attack showed just a quarter of the palestinian public supported hamas. but with thousands of gazan civilians killed and a million more displaced, even palestinian critics of hamas warn israel's military response is creating the conditions for the group's ideology to survive. >> hamas equals people's frustration if the palestinian people are frustrated more, that means hamas is more popular. >> reporter: and a new report that while palestinian civilians desperately struggle for basic necessities hamas is well supplied and refusing to give it away. arab and western officials tell "the new york times" the group has stockpiled hundreds of thousands of gallons of fuel for vehicles and rockets and enough food, water and medicine to last for months >> hamas still believes that they can put up a fight >> reporter: gershon baskin is an israeli negotiator who has dealt with hamas even if hamas as an organization can be defeated, can its ideology >> no. the only way we can replace the reality of the horrible life that people in gaza and in palestine have had over the last 75 years is to create a new reality. >> and raf, we're hearing for the first time from hamas's leader in gaza what is he saying? >> reporter: lester, his name is yahya sinwar i met him in gaza several years ago. he has a brutal reputation and says he wants all palestinian prisoners released in exchange for the hostages israel says he's their number one target. lester >> raf sanchez in jerusalem. thank you. we want to turn now to the rise of hate both here and around the world the israel-hamas war sparking an increase in antisemitism and islamophobia gabe gutierrez has more >> reporter: tonight the u.s. is condemning this pro-palestinian mob that stormed an airport in russia, looking for jews hundreds of men, some carrying banners with antisemitic slogans, rushed onto the tarmac searching for israeli passengers around the world demonstrations calling for a ceasefire in the israel-hamas war in pakistan some protesters burned israeli and american flags. >> how concerned is the white house that these demonstrations will spiral out of control? >> we believe in the right of peaceful protest. nobody wants to see peaceful protests turn violent or turn dangerous. >> reporter: in the u.s. the biden administration is announcing new steps to fight antisemitism and islamophobia on college campuses including federal agencies improving coordination between campus law enforcement and state and local counterparts at columbia university -- >> there are jewish students who do not feel physically safe on campus. >> reporter: at cornell police are guarding the center for jewish living after the university says a series of horrendous antisemitic messages threatening violence were posted online junior molly goldstein is the center's president. >> what's the sense of fear like on campus right now? >> i would say all students are absolutely terrified people don't -- don't know what to do with themselves and whether they should stay or leave campus >> reporter: the anti-defamation league reports since the war began antisemitic incidents in the u.s. are up nearly 400% from the same period last year. as the man accused of stabbing a 6-year-old palestinian american boy to death near chicago pleaded not guilty today, muslim leaders are reporting an uptick in islamophobia nationwide, with the council on american islamic relations citing nearly 800 complaints this month. incidents like this one at american university where a palestinian i.t. specialist says someone slid a note under his door threatening "go back to where you came from you might get lucky with a missile and meet your allah sooner." >> this whole eerie feeling just took over. my heart sank. >> reporter: as the white house tries to get a grip on rising displays of hate, today the justice department announced charges against a nevada man who's now accused of threatening to exterminate a u.s. senator for supporting israel lester >> all right gabe gutierrez, thank you. the last of the big three u.s. automakers, general motors, reached a tentative deal today with the united auto workers to end their strike jesse kirsch now with late details on that >> reporter: 46 days after the united auto workers' historic strike began the union and all of the big three are finally near the finish line. >> once again, we have won several astonishing victories. >> reporter: today the uaw announcing a tentative agreement with general motors after reaching similar deals last week with jeep owner stellantis and with ford. the uaw says all three offers include 25% base wage increases through april 2028, cost of living allowances and better retirement benefits. welcome news to workers like will prohoska, a husband and father who has been striking at stellantis's parts distribution center outside cleveland. what was it like going the last month-plus without your paycheck? >> it was actually pretty horrid. i went to salvage shopping, which is like expired canned food so that way we could save a little extra money. >> reporter: he says a new contract, which still has to be ratified by union members like him, would mean he can finally make as much money as long-time workers. now roughly 50,000 striking members are returning to work. and today president biden, who made history walking a uaw picket line, gave the thumbs up. >> these record agreements reward auto workers who gave up much to keep the industry working and going during the financial crisis more than a decade ago. >> reporter: but higher labor costs could mean higher sticker prices at the dealership there's no doubt that all of the automakers will be facing higher costs when it comes to building a vehicle and they've got to figure out how to make that up at some point >> reporter: those costs could benefit non-unionized auto makers but those companies' workers could also be enticed to join the uaw following these historic deals lester >> jesse, thank you. in 60 seconds, was a disaster averted near a colorado amusement park a man found with guns, bombs and improvised explosive devices. we'll have late details, right after this achieve long-term relief and remission. infusion and serious allergic reactions can happen during or after treatment. entyvio may increase risk of infection, which can be serious. although unlikely, a risk of pml, a rare, serious, potentially fatal brain infection cannot be ruled out. tell your doctor if you have an infection, experience frequent infections, or have flu-like symptoms or sores. liver problems can occur. it's time to ask your healthcare provider about entyvio. go to entyvio.com to learn more about the #1 prescribed biologic for crohn's and uc. ♪entyvio, entyvio, entyvio♪ only unitedhealthcare medicare advantage plans come with the ucard — one simple member card that opens doors for what matters. what if we need to see a doctor away from home? we got you — with medicare advantage's largest national provider network. only from unitedhealthcare. back now with the disturbing discovery at a colorado amusement park a man armed with guns, explosives and a tactical vest found dead there over the weekend. tom costello with more on the investigation >> reporter: it happened at the glenwood caverns adventure park in glenwood springs, colorado, about 40 miles from aspen the garfield county sheriff says park employees discovered the body of a 20-year-old man in the ladies' restroom as they prepared to open on saturday. the unidentified man died by suicide. found on the floor dressed in a helmet, black tactical clothing and body armor with patches and emblems. armed with real and fake semi-automatic rifles and handguns including ghost guns, loaded magazines and ieds, or explosives, both real and fake on the stall door he'd apparently written "i am not a killer. >> although he was very highly prepared, very highly weaponized, he chose not to take advantage of any of that, whatever his preparation was. we are to say the least extremely lucky that he did not fulfill whatever plan he may have intentioned. >> reporter: the fbi and the nearby bomb squad searched the park and the suspect's home for any other explosives investigators say the suspect had no criminal history >> there was nothing to indicate any type of warning or any type of, you know, concern on the part of family, friends, school, what have you >> reporter: the discovery came just hours after a 40-year-old shooter was discovered in maine friday night he's suspected of murdering 18 people at two crime scenes before dying by suicide. the sheriff in colorado says teams have combed the park property and the rides to ensure they're safe as they search for clues about what the suspect's motivations might have been. lester >> all right tom costello, thank you for that nbc's exclusive report coming up next. a mother's months-long search for her son turns into a mission for accountability after she learned he was hit and killed by an off-duty police officer. your best defense against erosion and cavities is strong enamel - nothing beats it. new pronamel active shield actively shields the enamel to defend against erosion and cavities. i think that this product is a gamechanger for my patients - it really works. personalized financial advice from ameriprise can do more than help you reach your goals. wow... we can make this work. it can help you reach them with confidence. no wonder more than 9 out of 10 of our clients are likely to recommend us. ameriprise financial. advice worth talking about. 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(vo) get iphone15 pro, apple tv 4k and 6 months of apple one. all three on us. only on verizon. now to our nbc news exclusive a mother in mississippi searching for her missing son, only to learn that he'd been struck and killed by a police car and no one had told her for nearly six months blayne alexander reports on what she's demanding. >> reporter: the last time bettersten wade saw her son dexter the two had an argument and he left the house. but three days later, when her 37-year-old still hadn't come home, she knew something was wrong. >> he's never disappeared like that? >> he never disappeared like that. he'd never, never. >> reporter: within two weeks she filed a police report. for months her calls to police got the same response - no update. help me understand what that time was like for you >> that time was horrible you would lay in your bed, you would think he might have been out there suffering, somebody might have had him, tortured him. you just want that call to say "ma, i'm all right. i'm all right. all you want to do is see your child >> reporter: then in august, nearly six months after dexter went missing, an investigator finally told her dexter had been hit and killed by an off-duty jackson police officer while crossing a highway it had happened less than an hour after he left home that day in march. then another bombshell. dexter had already been buried, in an unmarked grave behind the county jail. the only sign, a pole with the number 672. >> dexter, i tried to find you, and i couldn't i'm sorry, baby. i'm sorry you are here >> you saw buzzards circling and you're talking about a frightening thought. did they even put him in a wood box or did they just put him in a body bag and drop him in the ground? >> reporter: jackson police have not responded to nbc's request for comment. according to the coroner's office, an investigator identified dexter and shared contact information for his mother with police but she says she never received a call. after nbc news broke this story last week, jackson's mayor said this >> that at no point have we identified or did any investigation reveal that there was any police misconduct in this process and that there was any malicious intent >> reporter: do you believe that >> no. >> reporter: attorney ben crump says they're asking for the doj to open a civil rights investigation. they also plan to exhume the body and perform a private autopsy before giving dexter a proper burial >> lay some flowers there. and just to know he's in a safe place. >> reporter: blayne alexander, nbc news, jackson, mississippi and next, just in, the cast of "friends" reacts for the first time to the death of beloved co-star matthew perry. she found it. the feeling of finding the psoriasis treatment she's been looking for. sotyktu is the first-of-its-kind, once-daily pill for moderate-to-severe plaque psoriasis for the chance at clear or almost clear skin. it's like the feeling of finding your back... is back. or finding psoriasis can't deny the splendor of these thighs. once-daily sotyktu is proven to get more people clearer skin than the leading pill. don't take if you're allergic to sotyktu; serious reactions can occur. sotyktu can lower your ability to fight infections including tb. serious infections, cancers including lymphoma, muscle problems, and changes in certain labs have occurred. tell your doctor if you have an infection, liver or kidney problems, high triglycerides, or had a vaccine or plan to. sotyktu is a tyk2 inhibitor. tyk2 is part of the jak family. it's not known if sotyktu has the same risks as jak inhibitors. find what plaque psoriasis has been hiding. ask your dermatologist about sotyktu for clearer skin. so clearly you. sotyktu. life, diabetes. each day is a unique blend of going, doing, and living. glucerna protein smart with 30 grams of protein to help keep you moving. uniquely designed with carbsteady to help manage blood sugar response. glucerna, bring on the day. travis, did you know you can get this season's covid-19 shot when you get your flu shot? 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"we are all so utterly devastated by the loss of matthew we were more than just castmates. we were family." this as new details surrounding the actor's death. nbc news learning that it was perry's assistant who called 911 after discovering the actor unresponsive in his hot tub at his california home saturday afternoon tonight the medical examiner deferring his autopsy after it came back inconclusive. now they await toxicology results, which could take months >> by all accounts he was doing great. >> reporter: perry's former pickleball coach and long-time friend says that just hours before his death the star was playing pickleball with mutual friends at a nearby country club >> it's just a total shock. >> reporter: perry moved to los angeles as a teen. it was there he got into improv comedy ♪ and just six years later at the age of 24 perry would land the gig of a lifetime. as chandler bing on the hit nbc series "friends." >> someone at work ate my sandwich. >> well, what did the police say >> why is your family scottish >> why is your family ross >> there is a little child inside this man. >> yes but doctors say if they remove it he'll die. >> reporter: during the height of his fame perry says offscreen he struggled the actor said he went to rehab 15 times and detox 65 times now tributes pouring in adele stopping mid-concert sunday to praise perry for being open about his struggle >> i remember that character for the rest of my life >> reporter: tonight family and fans honoring their forever friend >> he was some guy >> reporter: chloe melas, nbc news. >> that's "nightly news" for this monday. thank you for watching, everyone i'm lester holt. please take care of yourself and each other. good night . right now on "nbc bay area news tonight," caltrans shutting down the eastbound side of the dumbarton bridge as we speak. it's the latest in a series of major road closures. parts of 680 will also be closed this weekend. also, a change of course by alameda county's district attorney. we investigate why some of her prosecutors were asked to come back to work while still under investigation. and how much their paid leave is costing taxpayers. we'll see more technological change in the next ten years. >> new rules for a.i. companies