New evidence shows that Bryan Kohberger may have infiltrated a woman’s home months before he allegedly carried out November’s slayings of four University of Idaho students, a news report says.

Kohberger befriended a woman, snuck into her home and moved items around before convincing her to let him install a video security system, a recent report by NBC’s “Dateline” says.

Kohberger and the woman were both students at Washington State University in Pullman, Wash. when he reportedly moved around items in her home to make her feel uneasy and fearful.