Okay, I'm an avid CSI buff and I KNOW the first suspect never did it.

Hmmmm, do we know if Richard walks in his sleep? Did anyone think to test the corpse for fingerprints/pawprints?

Does Richard's Mom have a key to his house and a secret yearning to enjoy her fireplace alone, in solitude and unfuzzy?

Did anyone test the mouse corpse to see if it had an allergy, perhaps to litter? It was found next to a litter tray afterall.

Did the mouse have an accomplice, and do we know if that accomplice has an alibi for the time of the alleged crime?

Do we know what the mouse's temperment was and did anyone check to see if there was a suicide note?

Note: it's about time for a lunatic mass murderer this season. And Richard does live in LA where l.m.m.s have been known to congragate. Richard dear, do lock up TIGHT tonight just in case someone other than Marg makes a return call!