and to detective voth. >> anybody involved has a possibility of being the murderer. >> so, voth questioned nanette and bill's own grown kids. couldn't eliminate anybody yet. >> we looked at the girlfriend and we also looked at the daughters. because anyone that stands to gain money in this situation is a potential suspect. >> bill's ex-wife was way off in hawaii. there's been divorced divorce for years. still, the detectives talk to her. when there was kevin, i bill's disabled son, and the only other person in the house at the time of the murder. >> newport beach emergency, police, fire. how can help? yes >> it was shortly after 9 pm when kevin heard the gunfire. he was upstairs. still debilitated by it's a car accident injuries. and he labored to make his way down to the kitchen. where he found his father. >> my dad was -- shot. >> i can't understand what you're saying? >> too disabled to explain that he needed help. >> somebody is dying? >> someone was dead. >> kevin was a suspect. we needed to find out the validity of his statements. whether he had gunshot residue on his hands. whether