After two and a half years of desperately searching for answers in the deaths of four Idaho college students, the case reached a bitter resolution as Bryan Kohberger admitted guilt for the first time.

With a series of “yes” replies to a judge, a man accused of killing four Idaho college students pleaded guilty in exchange for life in prison and no death penalty. But left untold so far: What motivated Bryan Kohberger to commit the middle-of-the-night knife attacks and why those victims?