Search for missing American takes "48 Hours" to Panama

Who's behind the disappearance of Yvonne Baldelli? Correspondent Peter Van Sant previews "48 Hours"' three-year odyssey to find out what happened to the Southern California woman who moved to Central America with the man of her dreams – and never returned. Watch "Devil's Island" Tuesday, June 23 at 10 p.m. ET/PT on CBS.