Mikelle Bigg was 11 when she was kidnapped from in front of her Mesa home nearly 20 years ago. Today, there might be a new lead in her case -- a $1 bill with a message purportedly written by Biggs that says, "I'm alive." Is it a clue? Or a hoax? Mike Watkiss explains. Full story at https://goo.gl/tbzH5F.