A western Pennsylvania jewellery store owner said a man charged with burgling the shop called and offered to help solve the case after the owner offered a reward.
Police have since charged 28-year-old Emile Pratt Jr with burgling Mark Multari's Gold Mind Jewellers in Sharon, about 60 miles north-west of Pittsburgh.
Mr Multari told a local newspaper that he announced a reward a day after the August 31 burglary and that Pratt called claiming to have heard glass breaking when the alarm sounded at 2:45 am, and said "he would help in any way" to catch the thief.
Police charged Pratt after tracing some of the 100 items stolen in the burglary to stores and pawn shops where Pratt allegedly sold them.
Online court records do not list an attorney for Pratt, who remains jailed.