BOSTON (CBS) – The hunt for the thieves behind the 1990 Gardner Museum heist has taken an unexpected turn.READ MORE: Bill To Scrap MCAS Test Is Subject Of Virtual Public Hearing
Investigators are now focusing on the nightwatchman on duty the night of the theft, according to a report from the Boston Globe.READ MORE: Keller @ Large: Mayoral Candidate Michelle Wu Says Boston 'Can't Afford To Just Nibble Around The Edges Of The Status Quo'
Richard Abath was thought to be a victim when police found him handcuffed and duct-taped after the robbery.
But now, federal prosecutors want to know why his footsteps are the only ones leading up to a stolen painting.MORE NEWS: 2 Injured In Chelsea Shooting, Police Search For Suspect
Abath maintains his innocence.