[Freeper 007]

When professional car thieves steal luxury cars, they can sometimes get access to the frequencies used by the manufacturer. I'm not saying the guy was murdered, but to say it was impossible just because all the keys are accounted for is being overly simplistic.

[Bloody Sam Roberts]

Ok then, lets just think about how much effort someone is going to put into it, to make it look like a suicide.
Why not just leave the door unlocked?
And I don't think it was being over-simplistic. It was a reasonable conclusion, seeing that I'm not part of the investigation and am not privy to every little detail of the case.