I am a bit surprised that Gabi was allowed to go in to see Nick it makes me wonder if she's a emotional wreck due to seeing Nick being crap or doing the shooting herself because she was pretty emotional and not the other suspects were that emotional and Julie wouldn't consider Gabi as a suspect.
I think Gabi did it. I've heard she was leaving the show and this would provide her with a perfect exit. Either she leaves town or goes to jail. So Will and Sonny get to keep the baby. Everyone lives happily ever after.
Although I do like the idea of Percy. But why since he has all the money and has left town.
Since the list of possible suspects already includes almost ANYONE in Salem who even knew Nick, we might as well include Caroline, too.(Oh, no--she was probably baby-sitting at the time.) Abe? T? Just kidding, I think...