http://www.washingtonpost.com/local...f4d856-9330-11e3-84e1-27626c5ef5fb_story.html
Police knew about Welch early in the investigation, authorities said, but its not clear whether they ever suspected that he could be involved. Back then, he was 18 years old and was known to stay in homeless shelters and hotels. He had a serious girlfriend, police said, who also worked with the carnival. It would be decades before his convictions for sex crimes in other states.
Late last year, Montgomery detectives looking through the case files began to take a new look at Welch. He jumped out at us in the past couple of months, said Assistant Montgomery Police Chief Russ Hamill.
Old case file documents show that a young girl who was with the Lyon sisters that afternoon had described a man who followed the three of them that day. Police developed a sketch partly based on that description, they said. It resembles a mug shot taken of Welch a few years later in 1977 when he was arrested in a burglary case in Montgomery.