I'm really enjoying these 'symmetry' theories about RJ turning Jane into a killer. Maybe they are red john's rules. Kill the guilty or RJ will kill another innocent. Seems like the kind of game that would befit the twisted sense of play given previous interactions.
Maybe the concussion bomb knocked PJ out and he was gathering clues in dreamland. Also, does anyone else find it strange that 2 regulars, well liked are being out out to pasture in a PI business. They must play a far bigger role before exiting, or it's just another 'whimper' ending to more great characters.