KC Wildmoon

Kaitlyn Babb was preparing to go to Oklahoma to testify against Jesse McFadden, the man she says lured her into an online relationship when she was 16 — and he was serving time for rape — when she got a message from him at about 8 p.m. on May 1, the first time they’d been in contact in years. “This is all on you for continuing this,” he wrote, with a photo of him looking directly into the camera. Now 23 and living in Texas, she said she was confused at first — and didn’t learn he’d killed his wife, her three children, and two teens having a sleepover with them until the next day.