It's been more than three years since the murders of Abby Williams and Libby German.

14-year-old Liberty German and 13-year-old Abigail Williams disappeared on Feb. 13, 2017, while hiking near their hometown of Delphi.

Volunteer searchers found their bodies the next day in a wooded area.

The search for their killer has evolved over the past three years, with police initially releasing a still image of the suspect and then an audio recording and a video of the suspect.

On April 1, Investigation Discovery's In Pursuit with John Walsh will feature this crime in hopes of finding the killer.

Producer Kayla Crandall brings you an interview with the co-host of the show before the episode premieres.