In my story I have written out a few versions of it, put them away, then came back to look them over, and came up with some new ideas. Basically the premise is about a cop who is on the trail of a serial rapist/killer villain. He ends up becoming one of the rape victims himself while getting closer in the investigation. The villain gets away with it, and he wants revenge and takes matters into his own hands. However, after looking it over, I was wondering how I should handle him being raped. It's a suspense thriller type story, and usually in these types of stories, they have a structure, where the MC has something bad happen to him, which propels him in motion and then later, something worse happens to him which is the icing on the cake that makes him undergo a character change that determines the third act. So I can have the rape happen at around the midpoint of the story, which sets the MC into action against the villain. So he undergoes his character arc earlier on. Or I can have him investigate the villain and the case, for a longer time, and then have his rape come at the second act climax, just before the third act. Thereby making the rape, the icing on the cake that makes him snap for the third act. But what point of the story is it better to have the MC go through this kind of change? Should it be earlier on, or should I save it for the icing on the cake to propel the climax, do you think?