At Campbell's November 1982 trial, he refused to testify in his defense, or discuss the murders at all. Testifying for the prosecution were neighbors who had seen him sneaking around the house on the afternoon of April 14, and his girlfriend Judy Dirks, who said that on the morning of the killings, he'd been at her home, where he consumed an entire six pack of beer. The next day, she noticed one of her kitchen knives was missing. Dirks testified that Campbell had "considerable resentment" towards Renae Wicklund and had driven past her home a couple of times while on work release. Campbell took the unusual step of cross-examining his girlfriend himself, and got her to admit that he had never told her he wanted to harm Renae Wicklund.