nanette and bill's own grown kids, couldn't eliminate anybody yet. >> we looked at the girlfriend and also looked at the daughters because anyone who stands to gain money in this situation is a potential suspect. >> reporter: bill's ex-wife was way off in hawaii. they'd been divorced for years. still the detectives talked to her. then there was kevin, bill's disabled son, and the only other person in the house at the time of the murder. >> newport beach emergency. >> reporter: it was shortly after 9:00 p.m. when kevin heard the gunfire. he was upstairs, still debilitated by those car accident injuries. he labored to make his way to the kitchen where he found his father. [ inaudible ] >> i can't understand what you're saying. >> reporter: too disabled to explain he needed help. >> somebody's dying? >> reporter: someone was dead.