"I was prepared to be arrested that day," Alivea Goncalves told ABC News of confronting her younger sister's killer in court.

After Bryan Kohberger was sentenced for the Idaho murders of Ethan Chapin, Madison Mogen, Xana Kernodle and Kaylee Goncalves, the latter’s sister detailed his true demeanor in court.

The sister of University of Idaho murder victim Kaylee Goncalves said everything in her body told her to “run” as she came face-to-face with Bryan Kohberger during his sentencing – but instead delivered a powerful, blistering takedown of her sibling’s killer.