University of Idaho killer Bryan Kohberger’s sister, Amanda, could have been called as a witness for the prosecution if his case went to trial, according to a report.

Kohberger, 30, accepted a deal to plead guilty to the murders of four students — Kaylee Goncalves, 21, Madison Mogen, 21, Xana Kernodle, 20, and Ethan Chapin — just days after prosecutors listed his sister as a potential trial witness, reported TMZ on Tuesday, October 14, citing newly unsealed court documents.

Amanda was Kohberger’s only immediate family member listed in the documents, per TMZ.

Kohberger, a PhD criminology student at Washington State University, pleaded guilty to four counts of first degree murder on July 2 in a deal to avoid the death penalty. On July 23, he was sentenced to four consecutive life sentence

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