

Jeff discovers that his wife has been interacting with his friend, and follows them to his friend's apartment near Lancaster, when he randomly encounters Niko Bellic. Jeff is first encountered in northern Algonquin, near East Holland.

She then turned to another one of Jeff's wealthy friends for emotional support, and although he was secretly interested in having an affair with her, Shirley was only going to him for a platonic friendship and was very näive to his obvious attraction cues. Shirley became distressed by his paranoid behavior, such as sending her underwear to a laboratory and demanding she get a tracking device in her head. Despite having obvious mental problems and wearing shabby clothes, he is an extremely wealthy businessman with a black credit card. Jeff reveals in the final mission that his mother left his father, which probably traumatized him into his current state.

Jeff is married to a woman named Shirley, they have a son together and is extremely paranoid that she is cheating on him.
