On 17 October 1998 Harris went to the house of 33-year-old Yvonne Ford, who had a mild intellectual handicap. Harris later said he "Just went there...I was probably out on one of me walks and I probably had a few drinks, in the area so I just went went to the house, ended up there". Ford let him in, and after some time he made a sexual advance towards her. He later said "We struck up a bit of a friendship, as, just, just driving her around, and I obviously could tell she was lonely, she was slightly handicapped. I didn't come, I didn't come around here for sex, I didn't come around here for anything, I just came around to say Hello, I live nearby, but then these thoughts started entering my head that I wanted to kill her."' As they sat in the bath together, Harris strangled her and held her under the water for 3 or 4 minutes. "It could have been her, it could've been anybody. She was just unlucky...I just thought she would be easy, to target, she wouldn't put up a fight or ... she would be relatively easy to kill". Asked how he felt after the murder he said "powerful, angry, just anger, pure anger. Not, not that she, there was no sex or anything, I was angry at the world. This is why this whole thing has happened, has started, and it was just my total anger building up from, I don't know, from the day I was adopted, it's just all built and built and, and something has set, set me off and I, I killed her".
