Today not to dismiss the case. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. In a moment, coverage of the financial shock waves rocking the world from the historic vote in britain. But there is breaking news in an unfolding tragedy here at home we need to tell you about. In west virginia, at least 20 people are now confirmed dead in a catastrophic flood disaster, the worst in a hundred years. 500 people remain trapped by those floodwaters in a shopping mall. Waters so powerful, ripping homes from foundations and sweeping away cars. Nbcs ron motte starts us off from the flood zone. Reporter it was sudden, it was violent, raging floodwaters ripping through whatever stood in its way, houses, cars, just about everything. I watched my car kind of flip io reporter ten inches of rain, onequarter of the average annual rainfall around here fell in just 24 hours, swallowing whole neighborhoods, leaving tens of thousands without power. Oh, lord. I watched three houses go down the river. And then crash. Reporter the governor declared a state of emergency. The damage is widespread and devastating. Reporter deploying 500 National Guard troops, the death toll rising through the day. This was supposed to be a quick trip . Yes, it was. And it turned into what . A nightmare. Reporter Shirley Slater and her daughter drove into the Shopping Center yesterday, but left on foot today. The bridge that got them there, the only way in and out, gone. Stranding 500 people along with them overnight. Were a whole lot luckier than a lot of people. So, hey, thank god were all right. Reporter also flooded, the famed greenbrier golf picturesque, now a muddy mess. Pro golfer bubba watson posting the video and photos on twitter. Tonight as floodwaters recede, the cleanup continues, and a new escape route is carved on a hillside outside the mall. The mall. A long night ahead for many hoping to get home soon, if home is still standing. Now, the people who did not scale that steep hill on the back side of this complex are stuck here for a second night. The fortunate ones have a room at that hotel. Those who arent so fortunate have to sleep in their cars or kmart or kroegers grocery store. They planned to put a temporary bridge across the span here, but they said the road is still moving, its too risky. That is quite a scene. Ron motte, thank you. Now to the other major story, the historic decision by british voters by their country to exit the European Union sent economic shock waves from the uk to the u. S. And a tidal wave of economic worries swamping the markets. The dow lost over 3 of its value, wiping out all its gains for the year. The eu established to bring unity and economic clout to europe is in crisis, as europe, the u. S. And the rest of the world absorb the profound ramifications. We have full coverage beginning with nbcs bill neely in london. Reporter it was an earthquake, britain turning its back on europe, a shaken Prime Minister resigning. I do not think it would be right for me to try to be the captain that steers our country to its next destination. Reporter beaten by a campaign that aimed to take back control from the European Union. Let june 23rd go down in our history as our Independence Day reporter antiestablishment is borrowed from the trump campaign. Its leader heckled, but now favored to lead the country. Its about the right of the people of this country to settle their own destiny. Reporter britain will now leave the union of 28 countries. Anxiety over jobs and crucial issues. Kick them all out. Reporter the vote to leave was roughly 5248, with voters who were english, older, and poorer sealing the victory. Some voted to protest, then regretted it. The family this morning, even though the majority of us voted to leave, we are actually regretting it today. Reporter there may be more regrets. This result puts thousands of jobs at risk. U. S. Banks, jpmorgan and Morgan Stanley warning theyll review investments in britain. As did carmakers, ford and toyota. President obama reassuring britain and america some ties wont break. One thing that will not change is the special relationship that exists between our two nations. Reporter the news made britains currency then start to globely fall. Britain will now leave the worlds biggest trg google reported a sudden uptick in the search question, what happens if we leave . The answer . No one knows. After a vote thats turned britain and the European Union on its head. The real danger now is a total breakup of the European Union. Other countries copying britain, even a breakup of the uk itself. The whole western alliance could be damaged. That worries washington. It would delight moscow. Lester . Bill neely tonight in london, thank you. Here at home, the news is already having a deep impact on the wallets of so many americans. High anxiety from wall street to main street, the markets taking a dive, Retirement Funds hard hit. Nbcs Olivia Sterns on what it means for your money. Reporter from the opening bell to the closing bell, a day of turmoil in global markets, with the dow jones dropping over 600 points. I think its just a far more widespread. Reporter former fed chairman Alan Greenspan sounding off on the brexit and warning of its impact here at home. This is the worst period i recall since ive been in public service. Reporter todays market plunge hitting retirement accounts, americans with 401 k s losing an average of 3,100 just today. But it may stabilize in the coming weeks. Do you think the brexit will drag down the stock market all summer . I think its going to keep a lid on it. I dont want to say its going to drag it down, because anytime you hear about problems in europe, the dollar gets strong and Interest Rates go lower. Reporter thats good news if you want to buy a home, but bad news if you have money in a savings account. Economic uncertainty could slow down growth in the u. S. Especially if consumers cut their spending, and Companies Cut jobs and manufacturing. Another Silver Lining for americans, tonight the u. S. Dollar is now the uk. Meaning a trip to Buckingham Palace just got a whole lot cheaper. There might be nearterm benefits were seeing, lower Interest Rates, cheaper travel abroad, but then the volatility in Financial Markets we know, nobody likes to watch that. Its like an endless roller coaster ride. Roller coaster rides are fun only for a short period of time. Lester, of course, for many people the temptation is going to be to sell amid this uncertainty. But Financial Advisers will tell you thats actually the worst thing you can do to sell after a big market drop. That said, they said because of how low rates are if you do actually have money to invest, you might want to consider buying a new home instead of putting any more money in the stock market. Olivia, thank you. The fallout is being felt also on and off the president ial campaign trail, which tonight stretches all the way to scotland, where donald trump held a press Conference Today as britons were still absorbing the news of their break from the European Union. Trump was asked about called, but at times he seemed more interested in talking about his golf course. Nbcs katy tur has more. Reporter as the uks brexit sent markets plunging overseas and at home, donald trump was touring his scottish golf course, and promoting his resort. Inside the lighthouse right now is incredible suites. Reporter turning to the global chaos unfolding around him, trump saw opportunity while the world worried, both financially look, if the pound goes down, theyll do more business. When the pound goes down, more people are coming to turnbury, frankly. Reporter and politically. I really do see a parallel between whats happening in the United States and whats happening here. People want too see borders. They dont necessarily want people pouring into their country. Reporter the fight to leave the eu similar to the presumptive gop nominees playbook, appealing to voters on trade, immigration and a sense of nationalism. Thats something support for what im doing across the world. Reporter though this was not a campaign event, trump in turnbury to promote his brand, he didnt exactly stumble on the world stage. Are you traveling with any of your Foreign Policy advisers . Are you huddling with them to find out what the best way theres nothing to talk about. Ive been saying that i would prefer what happened, i thought this would be a good thing. I think it will turn out to be a good thing. Reporter the Hillary Clinton team quick to use it all as political fodder. More people are coming to turnbury. Reporter Clintons Campaign was caught offguard by her own populist uprising in the primary against bernie sanders. Now some democrats are nervous what happened in britain could be a harbinger of a stronger than expected populist zeal in the u. S. That propels sanders and trump. Ironic that trump would praise brexit in scotland, one of the few places that voted ov it should be noted that while there are similarities between the u. S. And the uk, the u. S. s electorate is significantly more diverse than the uk. Lester . Katy tur in scotland, thank you. Lets turn to the deadly disaster on the west coast, explosive, fastmoving fire burning out of control north of los angeles. Already more than a hundred structures destroyed, and 1,500 more threatened. Nbcs Miguel Almaguer is in the fire zone with a look at the mounting destruction. Reporter explosive when driven and now deadly. The fire quickly roared through 20,000 acres. At least 100 structures up in flames. Consuming 11 miles in 13 hours, at speeds crews have never seen before, putting everyone on the run. Our firefighters have been engaged in a firefight of epic proportions. Reporter homes devoured in minutes. Hundreds scrambling to evacuate. A lifeordeath race [000 11 58;00] tonight we learn some couldnt get out. Several firefighters were injured from smoke inhalation. Ive never been in a fire where ive seen so many homes burned. Reporter the fire captain used facebook to broadcast live. Neighborhoods engulfed in flames. Propane tanks exploding. There werent enough firefighters or engines to save every home. My job is to show the people whats going on. As i went through here, the live video had thousands of followers, and shows what happened here, shows the destruction. Reporter the wind pushed this blaze over a highway. Too dangerous for residents to stay. 74yearold paul lost his home. Absolutely destroyed this whole thing. Look at it. Oh, man. Reporter with 1,500 homes still in danger, this region is on fire. The worst destruction this year. With two confirmed fatalities tonight, firefighters are searching debris fields like this one worried the death toll here will mount. The fire is only 5 contained. Its on the move, moving towards more neighborhoods. The concern . Theyll see more destruction like this. Lester . Miguel almaguer in california tonight, thank you. Still ahead, a man who spent 20 years in prison for a murder he says he didnt commit. Now hes free and hes talking exclusively to nbc news. 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Always discreet for bladder leaks here in new york today, a Stunning Development in a murder case nbc news has been following for nearly three years. A man freed this past spring after being wrongfully imprisoned for two decades, shocked a bronx courtroom today by asking a judge not to throw out the case against him. Telling me in an exclusive interview, he is determined to expose where and how the Justice System went wrong. Richard rosario is free, but still a prisoner to the memory of 20 years behind bars for a wrongful conviction. Obviously your best day was getting out of prison. What was the lowest day . About that cell. Reporter today in a bronx courtroom, as prosecutors tried to right the wrong and formally dismiss the murder case against him, rosario did the unthinkable, he asked for the murder case against him to remain open, until his name is cleared. The public should know the truth. The family of the victim should have that clarity, and that peace of mind that, you know, a murderer is not on the street and that his son receives the justice that he deserves. Reporter i first met rosario two years ago in prison. His story has never changed. Did you shoot him . No. Then why are you here . Reporter rosario was convicted of the 1996 murder of teenager George Collazo in the bronx after two witnesses identified him. But rosario offered poliis witnesses, more than a dozen, who would say he was in florida when the murder happened. What did you tell the detectives . I told them that the 13 witnesses i needed, gave them phone numbers. Reporter on his list, janine and john torres who remember the date well. Torres is now a florida sheriffs deputy. My son was born on june 20th, 1996. And theyre claiming richard killed someone on june 19th, 1996. Which thats physically impossible, because he was in my house when we were leaving for my wife to go to the hospital. Reporter torres says he was never contacted by new york police. Others on the list reached by nbc news say the same. Rosario was convicted and sentenced to 25 years to life. Two decades later, his appeals exhausted, rosarios surprise break came this past march, after his lawyers from the Exoneration Initiative convinced brandnew bronx d. A. Darcell clark to take a fresh look at the case. Vacated. Rosario was freed. Clarks office concluded, he didnt get a fair trial. You want the system to say it made a horrible mistake. Yes. Reporter the question today was whether he would be retried. But the prosecution moved to dismiss the case. When rosario shocked the courtroom, rejecting the dismissal. Though reunited with his wife and children, rosarios refusal to accept a dismissal of the case leaves him still free, but not cleared. As the court wrestles with what it admits is uncharted ground. If i had to spend every day of my life in prison to prove my innocence, i would have been prepared to do that. The nypd has refused to comment on the case. Meantime, the judge has adjourned the proceedings until august. The rosario case is a subject of a 12part digital seriesal conviction and can be found at nbcnews. Com. When we come back, too hot to handle. How dozens were injured at a seminar run by a famous selfhelp guru. Selfhelp they say big can never be good. Purina believes it can. Inspecting every ingredient for quality . Thats big. Being confident that your pets food is 100 safe . Thats big, too. Spending more healthy years with your best friend . Thats amazing. Big is exciting. Daring. For everyone. Pets dont just make life better they make it bigger. Purina. Live big. A farmers market. Ve whats in this kiester. A fire truck. Even a marching band. And if i can get comfortable talking about this kiester, then you can get comfortable using preparation h. 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With plans in place right now to cut that by as much as twenty, to thirty, to forty percent. So what sap really does for the under armour brand, it truly allows me to run our business endtoend. Its our new intern, barts first week here at td bank, hes a robot from one of those other banks. Were training him to bank human. I am banking assistance registration technology. Wait, wait, wait. But you can call me, banking assistance registration technology. Hi amy. Thank you. Thank you. Thats ok bart, it is here. At td bank we do things differently, like having the longest hours of any bank. Dont just bank. Bank human. Dozens of people have been injured requiring medical attention at an event in texas, with motivational speaker tony robbins. They were burned after robbins encouraged them to walk on hot coals, an exercise designed to help them conquer their fears. Its a regular part of robbins seminars, and its not the first time people have been burned. Representatives for robbins say about 7,000 people have done the coal walk with only a handful requiring medical attention not available on site. With just six weeks until the start of the summer olympics, the lab in rio entrusted to handle drug testing for the games has been suspended. An official with the World Antidoping Agency reportedly blames technical errors, and was quoted as saying they were pretty disturbing. White house tonight creating the First National monument of gay rights here in new york city, the birthplace of the modern Gay Rights Movement in america. It happened in 1969 when police raided a gay bar, the stonewall inn, sparking an uprising in greenwich village. The announcement comes as advocates celebrate this weekend, one year since the Supreme Court decision legalizing gay marriage nationwide. When we come back, i talked about a hole in one, a sinkhole on a golf course, reveals an amazing underground world. An amazi masame time tomorrow, fellas . New dr. 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But instead of letting it all go down the drain, owner johnny morris, creator of the pro empire, decided to dig deeper. Much deeper. You saw this as an opportunity . Might as well think positive. Reporter he had already discovered elaborate caves a few years earlier. What if this opened to another. Could they all be connected . And in a few years, could visitors marvel at the newfound underground beauty like they already do in the others . A treasure hunt. And something to share with everybody. Reporter theres no gold, but golf balls. Somebody made a hole in one. Are you blown away a little bit by what youve found . Its beyond words, i think. Reporter 30,000 truckloads of red missouri clay hauled away. Over 300 million years ago, we would have been standing here with sharks or other sea critters. Has anyone questioned your sanity at all . People think im about a half a bubble off or crazier than heck. You can tell im really fired up. Reporter fired up at the thought that johnnys big dig some day become a place where he can share the ozarks natural beauty, above and below the ground. Kevin tibbles, nbc news, top of the rock, missouri. That will do it for us on this friday night. Im lester holt. For all of us at nbc news, thank you for hello its our new intern, barts first week here at td bank, hes a robot from one of those other banks. Were training him to bank human. I am banking assistance registration technology. Wait, wait, wait. But you can call me, banking assistance registration technology. Hi amy. Thank you. Thank you. That is not protocol manager jenna. At td bank we do things differently, like having the longest hours of any bank. Dont just bank. Bank human. Lights, camera, access. I was saying hello, hello, hello. [ screaming ] a chilling and desperate cry for help. Im kelly mcgill is describing