Cold case …

… BOOK REVIEW: 'The Last Stone' by Mark Bowden - Washington Times.

He told detectives that he saw two girls who fit the description talking to an older man in the mall. He was given a lie detector test and failed. He then admitted that he lied to the police. The cops probably sized him up as a knucklehead who was high, and they kicked him loose after lecturing him about lying to the police.
“After that, the department didn’t give Lloyd Welch a second thought,” Mr. Bowden writes. “Not for thirty-eight years.”