Thank you!
1:00 - 1:30 PM: dropped off at trailhead by Libby's sister
2:07 PM: snapchat from Libby of suspect
3:00 - 3:30 PM: pickup from Libby's sister
5:30 PM: girls reported missing
6:49 PM: searchers in the area
Sunset was at 6:17 PM. They were probably dead around that time. Perhaps he was driving home by 6:20, arriving at 7 PM.
sunset peru indiana Feb 13 2017 - Google Search
I have read that abduction victims are usually dead within the hour, as with Molley Tibbetts, but if a pedophile murderer know that he has time with the victims, would he take more time?
If he abducted them at 2:15 PM, they walked to the scene of the murder in the next 20-30 minutes, the sun went down at 6:15 PM, he had four hours to assault, murder, clean up, get to his car and then drive the 40 minutes home.