I'm starting to see Partridge trending again:

Listen, If Partridge was RJ the writers would be going against everything they said the ending would be about..neatly tying up RJ and not ending like shows like Dexter... and they would be jumping the shark.

Lisbon and Cho are the two most anal retentive cops about procedure. Yet both would had to have missed whether he was dead or whether it was him as a corpse. Then the cop or whomever showed up at the scene to announce Partridge was DOA would have to be part of a cover up, along with the ME. Jane told Lisbon in the hospital he was dead. The actor Plotnik said he was dead. Sorry, if they somehow suspend it all to make this guy reappear then they did the show no favors and have made it a joke.

The arm thing has a simple explanation. People are trying to tie that with the real time of when it happened. The reality is that it was probably cut off in Episode 1 by RJ or a Tyger/Tyger person. Why? Well at the time Tyger/Tyger wasn't outed by Jane. At that time, Jane hadn't had his meeting. At that time no one knew about the tatoos. So wouldn't it make sense to cut off the tatoo to hide the existence of a Tyger/Tyger group? Yes, logically it would in the sequence of events.

If I'm wrong, great, but it would be disappointing and take what reality was planted for 6 seasons.