RJ's PHOBIA
I agree with Theory #5302 about RJ's phobia possibly being a fear of pigeons, BUT even so, the birds seemed in the house while Partridge was killed, so it's not clear --- though Libson had called for back up long before she entered the house and perhaps it had finally arrived.  I suspect though that RJ enjoyed spooking her with the "blood on your hands" [in this case, face] symbolism as he clearly made a statement that Libson's interference caused him to kill Partridge, as if SHE had killed him or MADE RJ have to kill him.   

THE "LIST"

This list of seven, now six -- it is not the only list PJ has made.  In "Black Cherry," Jane had a different list of 10 suspects in his book.  So when Heller says the name is definitely on the list, he could be talking about that one, too.

PJ would NEVER want RJ to know he's on to him.