The teen charged with killing three men in a phony on-line jobs posting scheme was heard on tape acknowledging he dug a grave for one of the victims.17-year-old Brogan Rafferty is also heard telling investigators in a tape played in court Thursday the motive was stealing the victim's identity. Rafferty and his mentor, 53-year-old Richard Beasley, have been charged in the case. Rafferty also says Beasley had him help put the victim in the grave.