This classic episode of “48 Hours" explores the mysterious 2008 disappearance of Robert Wiles, the son of millionaire business owner Tom Wiles. On April 3, Tom opened an e-mail from his son Robert containing a ransom demand signed, “Group X”, and asked for Tom to put $750,000 in Robert’s office if he ever wanted to see his son alive again. Tom involved the FBI with the ransom note and they set up a sting operation in Robert’s office to try to find out who the kidnappers were. “48 Hours” correspondent Peter Van Sant reports. This "48 Hours" episode last aired on 1/5/13. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.