 A short time after Welch told this story to the mall security guard trying to cast suspicion on the other man, he was questioned at a police station, failed a lie detector test, admitted he had lied, was released and was not questioned again until more than 38 years later.During the reopening of the case, police discovered that a mug shot taken of Welch in 1977 bore a strong resemblance to a police sketch of a possible suspect who had been seen staring inappropriately at the Lyon sisters in the shopping mall.Detectives began interviewing Welch in prison; he made statements that further implicated him although he continued to protest his innocence.