The Colorado man who is accused of killing his wife and daughters once gave a presentation on relationships in which he talked about wanting to leave his partner, The Denver Post reports. Police said Christopher Watts confessed to killing his wife, and they also said he was having an affair with a coworker. A YouTube video from 2012 shows Watts giving a presentation called “Communication Speech, Relationship Deterioration and Repair.” “Sometimes you find your partner no longer attractive physically or in their personality,” he said in the video. “When you are in a relationship, you have to show desire, lust toward your partner. Sometimes when you get married that the lust and the desire kind of fall by the wayside a little bit.” He continued, “You feel that you might be better with someone else that you’ve met.” “You think that you can no longer do—that your partner is someone that you can’t be with.” Watts was charged with first-degree murder and other counts. Authorities discovered his wife Shanann’s body in a shallow grave and his daughters’ bodies in nearby gas and oil tanks, according to an arrest warrant affidavit.