Delphi, Indiana, double murder suspect Richard Allen spent 13 months in solitary confinement, despite its negative impact on mental health, an official testified.

Delphi eighth-graders Abby Williams, 13, and Libby German, 14, were killed on Feb. 13, 2017 while walking on a local hiking trail. The girls had documented some of their walk on Snapchat.

Delphi suspect went to police 3 days after murders, but 'fell in the cracks' for years, sheriff says By Jeremy Edwards and Emily Shapiro, ABCNews Friday, October 25, 2024 ...

This photo released by the Indiana State Police, Feb. 13, 2017, shows a man walking along the trail system in Delphi, Ind., that authorities say is a suspect in the Delphi murders.