CNNW Anderson Cooper 360 March 21, 2013
good evening. a big night tonight including the manhunt for the killer of a top law officer gunned down in colorado. he was the chief of that state's prisons and was killed on the doorstep of i had hos of his ho and children and you a siau new number puts the numbers of children with autism at 1 in 50. has there been a dramatic increase? that's the question, tonight dr. sanjay gupta joins us for that. also tonight, a major break in the biggest art heist ever. precious works valued at half a billion dollars, stolen. we have an exclusive interview with a former guard from the museum...