Fiction Question: What would legal proceedings look like in a situation like this? (Details inside)

I’m probably going to be finishing my young adult novel tonight that I have been working on for years, and I need some info. Spoilers to follow

I’m working on the last chapter where all the loose ends of the story are tied together. Basically, the female protagonist (and love interest of the male antagonist) has shot and injured the male antagonist (who had tried to drug her with GHB so he could rape her) with a bow and arrow (she’s an archer in the story).

In the story, where I’m at, the female protagonist has fled to her favorite spot where the male protagonist finds her and asks her about events that lead up to that point. She reveals that the male antagonist tried to drug her to rape her and she shot him with her bow before he could finish the deed. The cops show up and she willingly turns herself in. In this last chapter I’m working on, the male protagonist hears from her and she tells him she’s getting off clean.

The problem is, I don’t know how to write this part realistically. The male antagonist and would be rapist doesn’t die. If she shot him on Halloween Night, how long would it be (on average, and in a small town) before she went to trial? Would she have a case for self-defense? If the male antagonist had a change of heart and decided not to press charges, would the whole thing be dropped?

Any advice or information is greatly appreciated.