There were spoilers circulating months ago that Adam would be shot. One spoiler said Ashley would do it. The other said that Patty would do it. At the time, my money was on Ashley but as things are developing with Patty (as Emily) being assigned as Adam's shrink, it seems nutty Patty might be more likely.
Either way, both spoilers said that Adam would survive and he would blame Nick. So who knows? All the spoilers have dried up since then. No one knows what is going to happen except that Muhney posted at several boards that he's about to be gone from the show soon and didn't say what his exit would be like.