>> reporter: in one infamous tv moment on "the montel williams show," sylvia browne told shawn hornbeck's to their face that he is dead. >> there are two jagged boulders -- >> he's there? >> he's near the boulders. >> is he still with us? >> no. >> reporter: four years later, shawn was found very much alive. >> this is probably the best day of our lives. >> reporter: browne apologied, but says she's broken case after case since. >> somebody that's holding out hope, you tell them their kid's dead? >> you are amazing. >> thank you. >> reporter: it's because he's much more than a critic. he's a crusader, a mentalist, who for years has yuked magic tricks to prove magical powers are just an illusion. >> it's not been proven in a laboratory yet. it's not science. it hasn't been science, it never has been. >> reporter: to prove his point, when he was just 18, banachek managed to convince researchers that his gifts were worthy of scientific study. it was all a ruse. >> to be honest, we cheat. >> reporter: had he not told me it was a trick, i would have believed he was a psychic. >> i signed it, i

montel williams collapsed on the field about an hour into practice and died later at the hospital.word on what caused the 15-year-old to collapse. it comes after the deaths of two other players in georgia and south carolina and a coach in texas. 10,000 extra police officers calmed the streets of london following the worst riots that city's seen in more than 30 years. the unrest spreads across england and brazen crowds of young people ransack stores and torch cars for a fourth night. michelle is in london now. michelle, what are they doing to bring a stop to it? >> reporter: everything they can, pretty much. they really tried to pour police into these areas. in london it seemed to work. there was publicity for an entire day leading up to it. 16,000 police on the streets. they were able to use more force than necessary the past couple of days. you have the citizenry saying okay, now thanks for doing this three days later, too little, too late. it does seem to have quieted things down. at least here in london. elsewhere as you mentioned cities like birmingham and manchester had some s