The suspect, 50-year-old Richard Allen, was booked in Indiana around midnight Friday - though it remains unclear what exactly he has been charged with.
Shortly after the arrest of Richard Allen, 50, a photo emerged showing him posing with his wife with a suspect sketch from the investigation posted on a wall behind him.
A chilling photo shows the daughter Richard Allen, 50, posing on the train bridge where Libby German, 14, and Abigail Williams, 13, disappeared in 2017.
Just 7-years-old, Sarah Jean Bowker was molested, killed and left in a ditch. There was never a conviction in the 1990 case, and the suspected culprit is dead.