children. is the app causing kids to drive dangerously? "nightly news" begins right now. from nbc news world headquarters in new york, this is "nbc nightly news" with lester holt. good evening. the october surprise that rocked the race for president on friday may not have rocked it enough to move the needle with voters, at least not yet. the new nbc news/survey monkey poll shows hillary clinton ahead of match-up. notably, there is no change between the monday through friday numbers and those from over the weekend after the news broke that the fbi was looking into newly discovered e-mails related to hillary clinton's time as secretary of state. fbi director james comey made his surprising announcement before those e-mails had been examined. but tonight nbc news has learned that process is under way. our pete williams has been breaking developments in the story all weekend, and us. >> reporter: the fbi's been at it now for about 24 hours, starting the work just after getting a search warrant to analyze the thousands of e-mails discovered on former congressman's anthony wein weiner's laptop during a separate investigation of him. the big question, will these e-mails shed new life on the investigation into hillary clinton's private e-mail server? tonight officials say, no answer yet. the clinton campaign has huma abedin doesn't remember using it. a how did they get there? it's possible computer experts say, she used it and forgot, or e-mailed him and unintentionally launched a backup. the answers are on one of these, a hard drive from a laptop computers. officials say the fbi has made an exact copy of the one on wiener's laptop. that company is being analyzed in a computer forensic lab like this one. intact, the way it was, and work off the copy, so you don't accidentally ruin the evidence itself. >> reporter: most of the process is automated, weeding out e-mails that aren't hers, narrowing those down to ones sent or received while clinton was secretary of state and then eliminating any that are duplicates of the thousands already seen in the clinton investigation. those left will be examined to see if they could contain classified information. but until the fbi has some results, officials say director james comey has no what he told congress last friday about finding the abedin e-mails. that disclosure violated justice department policy, but tonight the department says in a letter to congress, it's committed to move expeditiously as possible. tonight officials say the fbi's work on the hard drive is moving along without any technical problems. they declined to say how long it's going to take to get the answers. there's less optimism tonight it can be done before election day, but at this point, nobody knows for sure. one everybody's watching, pete, thanks. eight days to go, both campaigns scrambling to respond to this late stunner. hillary clinton and her supporters questioning the timing by the fbi director, so close to the election. and the trump campaign seizing what it sees. here's andrea mitchell on the trail in ohio. good evening. >> reporter: good evening, lester. the clinton campaign seizing moments ago on a new report that fbi was reluctant to publicly blame russia for cyber hacking democrats this close to the election. they called that a jaw-dropping double standard given the revelations about top clinton aide huma abedin. this is the latest clinton slam on comey. tonight top hillary clinton aide huma abedin not on the trail with clinton, as clinton intensified her attack on fbi director james comey, trying to rally the base and reassure undecided voters about the e-mail excuses. i've said it was a mistake and i regret it. now they apparently want to look at e-mails one of my staffers -- and i am sure they will reach the same conclusion they did when they looked at my e-mails for the last year. there is no case here! >> reporter: just a few months ago, clinton and other democrats praising comey for not pursuing criminal charges against her. >> i'm grateful for the professionalism of the fbi. >> he's somebody with the highest standards man. >> reporter: clinton supporters now taking shots. former attorney general eric holder writing -- good men make mistakes. in this instance, comey has committed a serious error. >> i call it a betrayal of long-standing fbi protocol. >> reporter: but the white house not joining the chorus. >> i'll neither defend nor criticize what director comey has >> reporter: tonight the clinton campaign saying it was blindsided by the fbi's announcement and expressing confidence in abedin. considered a surrogate daughter, bill clinton officialiating at her glamourous wedding to anthony weiner. and after wiener's sexting scandal, his wife taking part in a documentary intended to revive his political career. >> it's a nightmare. >> reporter: now a new nightmare for the clinton team, what feels like a punch in the gut to staffers. concerned not so much about losing, but the impact on democrats in tightat andrea mitchell, nbc news, cincinnati, ohio. >> reporter: i'm hallie jackson in michigan, where on halloween, donald trump's supporters may be walking dead, but tonight their candidate is finding new life on offense. >> good job, huma. thank you, anthony weiner. >> reporter: the latest fbi story giving trump an opening. >> we can be sure that what is in those e-mails is absolutely devastating. >> reporter: but nobody really knows what's in those that's not stopping trump from hitting clinton on those messages and on the latest wikileaks release of stolen e-mails, which nbc has not authenticated, showing clinton's campaign may have been tipped off to a primary debate question by the now head of the democratic national committee. >> could you imagine if i did that? bobby, what would happen to me if i did that? electric chair, i think. >> reporter: trump getting back up from basketball coach bobby knight in michigan, one of several blue-leaning battleground states. his goal, force clinton to make a defense play. the problem, polling shows trump behind in these might-win states. yet he hasn't locked up the must-win, like florida and ohio, where margins are razor thin. now trump's also facing new questions about his charitable donations. with "the washington post" reporting on his 1996 visit to a school for children with aids. >> trump hadn't given them money. he wasn't invited to was not donated at all and stole a seat on the stage that was reserved for another donor. >> reporter: tax returns would show how much he's given. he hasn't released them. for the next day days, looking to focus not on himself, but on his rival. >> it's a time where the prize is clearly within view and staying on message is an essential step to getting that prize. >> reporter: trump's aides see attacking ob cair as especially effective, which why he'll focus on suburban philadelphia, another area where he's making a play, but playing from behind. lester? so let's bring in our political director, the moderator of "meet the pres press", chuck todd. all along with race has seemed impervious to damaging moments and events here. it seems to be the case here. how do you explain it? >> this has been a remarkably stable election because we have two nominees that were so well known, well defined, and frankly, already unpopular. news, especially when it's negative news that reaffirms a belief that was already out there. when it comes to e-mails, hillary clinton herself said it at her friday night press conference. she believes a lot of it is baked in. and i think that's what the polls are showing. it's had marginal impact on enthusiasm, particularly republican enthusiasm. what does that mean? it's possible, lester, we are now headed for a result that looks more like a generic d, generic r, or the 2012 of a traditional red-blue map, traditional turn-out on both sides. so if it did anything, it may have just bumped up republican enthusiasm just enough to keep things more competitive all the way up and down the ballot. >> eight days to go, chuck todd, thank you very much. >> you got it. meantime tonight, as the fbi continues to review those e-mails, nbc news has learned of another situation involving the if anything. law enforcement sources say the feds have launched a former campaign manager paul manafort, looking into his business ties overseas. we get details on that from our senior investigative correspondent cynthia mcfadden. >> reporter: into the gasoline, democratic leader senator harry reid threw a match yesterday. in a letter to james comey criticizing his decision to notify congress of the newly discovered huma abedin e-mails, perhaps relevant to the clinton investigation, he drops this bomb. in my officials in the national security community, it has become clear that you possess explosive information about close ties and coordination between donald trump, his top advisers, and the russian government. what is senator reid talking about? law enforcement and intelligence sources tell nbc new today, the fbi has been conducting a preliminary inquiry of donald trump's former campaign manager paul manafort and his when nbc news asked the fbi to comment on the inquiry, the fbi did not respond. >> americans have every right to be concerned about what they see in terms of trump advisers and their closeness with the kremlin, trump's policies, vis-a-vis russia, trump's potential financial interest in russia. >> reporter: paul manafort was reportedly paid $12.7 million in cash by pro-russian politicians in the ukraine. and nbc news can also report what some call distng oligarchs. one ukrainian, one russian. both billionaires. american officials say both have ties to the russian mafia. >> i think it does raise serious concerns about the policies that trump would pursue if he were president. >> reporter: while an inquiry is a preliminary look and falls short of a criminal investigation, in this highly charged atmosphere, it has some arguing that comey is using a double standard. an investigation involving one candidate, it opens the director up to claims of bias if he doesn't discuss other potential investigations. >> paul manafort tells us tonight none of it's true. there's no investigations going on with the fbi that i'm aware of. as for donald trump, his spokesperson told us, mr. trump severed his ties with mr. manafort many months ago. mr. trump has no knowledge of any of his past or present activities. lester? this evening, we're hearing for the first time the voice of a killer during the largest mass shooting in modern u.s. history. police in orlando have released the audio recordings from the pulse nightclub massacre between the gunman, omar mateen, and a crisis negotiator. nbc's gabe gutierrez has late details. >> reporter: the chilling 911 call came in at 2:35 a.m. >> i want to let you know, i'm in orlando, emar mateen's rampage was under way and hundreds of people were scrambling to escape the pulse nightclub in orlando on june 12th. >> i pledge my allegiance to abu bakr al baghdadi on behalf of the islamic state. >> reporter: the killer at first speaking with an emergency dispatcher, then a police crisis negotiator. >> can you tell me where you are right now, so i can get you some help? >> no. because you have to tell america to stop iraq. they're killing a lot of innocent people. >> reporter: he falsely claims there are cars outside rigged with bombs. >> i'm going to ignite it if they try to do anything stupid. >> reporter: mateen then praises the boston marathon bomber. >> my home boy tamerlan tsarnaev did his thing. >> you're annoying me with these phone calls and i don't really appreciate it. >> reporter: a 49 people are dead, 53 wounded. among those killed, 30-year-old eddy justice, his best friend dmitrius, survived. >> he opened fire and just killed innocent people and people begged for their lives and cried out, please don't do this. >> reporter: a judge will now decide whether to release more than 200 other calls during the carnage. the deadliest mass shooting in u.s. or still ahead tonight, the final moments before a deadly krar cacdead ly car crash caught on camera. also, it might be camera. also, it might be the scariest thing at i love f the morning ritual around here. people rely on that first cup and i wouldn't want to mess with that. but when (my) back pain got bad, i couldn't sleep. i had trouble getting there on time. strength of aleve. for pain relief that can last into the morning. ? 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at fidelity, we don't just manage money, we manage people's money. ? massachusetts has many great public schools, and we took it for granted that our kids would go to great public schools. but some kids aren't so lucky. where they live, they don't go to a great school, and they have no choice. ls give parents a choice and are a pathway to success for these kids. if you like your school, question 2 won't affect you. but question 2 will change the future for thousands of kids who need your help. please join me and vote yes on question 2. we're back now with new concerns about a popular smartphone app used by millions, especially younger people. snap i under scrutiny for its speed filter that clocks your speed as you take photos or video. as nbc kerry sanders explains, a car passenger was recently using that feature right before a horrific deadly crash. >> reporter: critical moments just before a horrific deadly crash, this ten-second snapchat video posted by a passenger in the car using a feature that records and displays their feed. first 82 miles per hour, then 115. less than ten minutes slammed into a minivan. five died in the crash. the driver and his passenger, and in the van on their way home from church, a 39-year-old mother, or 9 and 10-year-old children. another 19-year-old daughter and 15-year-old cousin in the van survived and are in the hospital tonight. >> we do question how it happened, you know, why did it happen. >> reporter: the florida highway patrol says it remains unclear wha snapchat played. >> had she not been doing the videotaping, the snapchatting at the time, maybe he might not have been performing this operation and driving so recklessly. >> reporter: when moving snapchat displays a do not snap and drive warning. the company says, we actively discourage using the speed filter while driving, with more and more accidents from georgia to louisiana to texas, all allegedly involving snapchat. one question. >> the only purpose in my mind is for folks show off how fast they're going. >> reporter: active snapchat users say eliminating the speed filter from the app won't make much of a difference, because users will simply point their phone at the speedometer. tonight the families of the victims in this crash are not commenting on the snapchat video, as they focus on making sense out of this horrible tragedy. kerry sanders, nbc news, miami. we're back in a moment with the police chase and deadly shoot-out triggered in chase and deadly shoot-out triggered in the manhunt for a this is my body of proof. and clearer skin. this is my body of proof that i can fight psoriatic arthritis with humira. humira works by targeting and helping to block a specific source of inflammation that contributes to both joint and skin symptoms. it's proven to help relieve pain, stop further joint damage, and clear skin in many adults. humira is the number #1 prescribed biologic for psoriatic arthritis. humira can lower your ability to fight infections, infections and cancers, including lymphoma, have happened, as have blood, liver, and nervous system problems, serious allergic reactions, and new or worsening heart failure. before treatment, get tested for tb. tell your doctor if you've been to areas where certain fungal infections are common, and if you've had tb, hepatitis b, are prone to infections, or have flu-like symptoms or sores. don't start humira if you have an infection. want more proof? 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's even playing politic games with medicare. vo: kelly ayotte voted to cut medicare and cost seniors up to $1,700 more for prescriptions... while protecting tax breaks for the wall street banks and big oil companies that fund her campaign. fred: kelly ayotte sold us out. britt: with kelly ayotte, it's all politics. joanne: she's not looking out for new hampshire anymore. vo: senate majority pac is responsible for the content of this advertising. a massive explosion outside birmingham, alabama, today, sent a plume of smoke into the sky that could be seen for miles. at least seven people were injured as fire crews raced to contain the fireball at the scene. officials say it happened about a mile away from the site of a recent gas pipeline leak. the company has now shut down its main lines in that area. the week-long manhunt for a dangerous fugitive in oklahoma has come to the suspect, wanted in a series of violent crimes, including a double murder, led police on a chase last night before he was killed in a gun battle with state troopers. nbc's blake mccoy has more on how he was taken down. >> reporter: the dangerous fugitive oklahoma police had been desperately pursuing for a week, was finally spotted by don williamson has he was gathering firewood on his property saturday. gun battle with law enforcement that left a sheriff injured and michael vance dead. the week-long manhunt began 150 miles away last sunday, following another police shoot-out that left two officers injured. >> i think i hit him twice. >> once in the shoulder? >> once in the shoulder and once in the lower abdomen area. >> reporter: vance posted his get-away on facebook. >> this ain't a joke, this ain't a prank. [ bleep ]. >> reporter: vance was wanted for a string of violent crimes, including the murder today an accomplice was charged accused of providing vance medical assistance, ammunition, and trading him an ak-47 when he was on the run. a seven-day manhunt finally over. we'll switch geers in a moment. still ahead it's the nice every kid loves. but for parents, finding the right costume can be a challenge. "nbc nightly news" is brought to you by pacific life. helping long-term financial security for over 145 ? like a human fingerprint, no two whale flukes are the same. because your needs are unique, pacific life has been delivering flexible retirement and life insurance solutions for more than 145 years. ask a financial advisor how you can i love my shop, but my back pain was making it hard to sleep and open up on time. then i found aleve pm. the only one to combine a sleep aid plus the 12 hour pain relieving strength of aleve. now i'm back. aleve pm for a better am. i served under president bush and obama. i fought the taliban. i was asked to form a global coalition to counter isil. when someone makes the comment that they know more about the islamic state or isil than do the generals, it implies a complete ignorance the reality. but i believe secretary clinton really understands the threat that the islamic state poses to the united states and to the american people. and i believe she understands how to wield american power to ultimately defeat this threat and to keep us safe. i'm hillary clinton finally on this halloween night, tricker on treaters are outn the country. and this year as many parents are keenly aware, kids are facing stiff competition to find the perfect costume. here's kevin tibbles. >> reporter: ghouls and goblins on parade at roosevelt elementary in burbank, california. >> this is a big day for kids. >> reporter: and folks, who could possibly be scared by awesome cuteness like this? little darlings all worth their weight in refined sugar. preparing for fright night can be a nightmare for parents too. >> the older they are, the more demanding they are. so there is pressure. >> reporter: not too many years ago, costumes were cobbled together by mom over the kitchen table. >> who are you going to be? >> that girl. >> reporter: this year, americans will spend almost $7 billion on halloween, many migrating to chicago's fantasy costumes, where even this afternoon, parents were in a last-minute frenzy. >> it was last night that we had people here at 2 and 3:00 a.m., in a panic, trying to get stuff for their childrens. >> reporter: some in hysterics. are you under extreme pressure to produce a good costume? >> kind of. >> reporter: but the worst thing of all. they don't have the size. >> no. >> reporter: shriek, horror. >> isn't that what parents are for? it happen pch. >> trick or treat! >> reporter: so enjoy the little devils, whoever they are tonight. kevin tibbles, nbc news, chicago. >> have fun tonight, kids. >> now at 7 a wild chain reaction crash in the back bay. fire fighters rushed to the hospital. we have team 7 coverage. >> anchor: police release new video they say is linked to a t attack. >> reporter: headed into a warm up by the middle of this traded. breaking down the deal that sends jamie collins to cleveland. >> anchor: today's new twist in the clinton email scandal. >> anchor: the toll booths are coming down. >> anchor: so does the easy pass mean an easy commute. >> 7 news at 7:00 starts now. >> a fire truck and a car collide. >> the next thing we heard was this loud bang.