A forensic investigator revealed on Monday’s Crime Stories with Nancy Grace that University of Idaho killer Bryan Kohberger had been watching the podcast on his phone.

“It seems that he would watch Crime Stories, your show, on YouTube, and it was cached to his phone,” Heather Barnhart, lead digital forensic investigator on the Kohberger case, told Grace. ” … The phone is just smart enough and it will take little snippets and save it to his device.”

Forensic psychologist Caryn Stark said the snippets show what the murderer is “obsessed about.”

“It makes perfect sense that he would be watching you and Crime Stories with Nancy Grace,” she said. “What is a better place — I can’t think of any — than to go and watch you.”

Grace described the news as “really freaky — watching Crime Stories and/or me to the point his phone saves it?”

Cold Case Foundation director Chris McDonough viewed Kohberger as “like a scientist that looks at bugs.”

“He’s wanting to learn from you, so he’s seeing you a little bit different,” he said. “We may not understand the why, but we understand the what — what’s in his mind and how he executed it.”