michelle's husband brandon bloss wasn't thrilled, either. >> it really creates ego problems.t's one thing if your wife starts having an affair with another male. i think if your wife's having an affair with a female, it even creates more problems, and i think that since that was occurring in this relationship it caused quite a bit of anger between brandon and devon. >> friends told police that devon, keary, michelle and even michelle's husband brandon were often at odds. >> of course, anytime you interject a third person without the consent of both parties, there's going to be a problem there. >> it's four people, not just michelle and her husband and devon. it was also keary was involved. and keary was the spark plug, if you will. >> in tracing devon guzman's last known movements, a witness told police he saw devon guzman at michelle and brandon's home on the night of her murder. >> i woke up because there was some noise outside that i realized was an argument. the woman i now know to be devon was standing on the doorstep on the house in back of me with two people inside the