and on the security cape, looked closely and saw the man leaning through the window of the pharmacy section seemingly checking out names from pill bottles. over and over detective arnold staired at the grainy walgreens tape. the man in the baseball cap looked familiar. as in james. erin's family friends who phoned her minutes before the murder. earlier he told the detective how much he wanted to help the investigation. >> i want to help you, help you find whoever did it. >> rick wasn't buying any of it now. he has become a prime suspect. though rick wasn't ready to arrest him. not yet. not until he had the other man, but that wouldn't be easy. although there were two suspects in his sites, the mystery man was not in focus. >> how clear is the image of the second guy. >> it's not very clear. >> coming up, it turned out it