Long time time lurker, first time posting. I'm not implying this guy did it and he very well may have nothing to do with the case, but it isn't a very reliable alibi sitting home alone watching tv. Also, I know some criminals and psychopaths think they are invincible and smarter then cops, and sometimes they talk to the police and media (Scott Peterson comes to mind). They think putting themselves out there and saying they have nothing to hide makes them look innocent. Again, police have DNA and can rule him in or out, but just because he is out there talking, doesn't make him innocent.