Bits of Spin
I think it is a good start. My suggestion--please don't take it as a criticism--is that it should add a new twist. The "life imitates art" genre appears over and over again (ventriloquists and dolls taking on alter egos, copycat killers, etc.) to the point of being predictable. Using the genre is fine, just make your story stands out a bit. Predictable (aka 'formulaic') is not necessarily bad, just not memorable.
In one writing class, we had to take a fairy tale or children story and change it in a way that made it
unique. It's not as easy as it sounds. One way you can step up the story is by distancing the character from the obvious. The actor in studying for the roles keeps a personal diary or 'character study log'. It gets "misplaced" and suddenly things start happening. Now it's up to your personal inclination to decide to lead the viewer to the obvious conclusion (someone took it) and throw in some twists to make it unclear if it is him in an "altered Jekyll/Hyde state" or someone framing/mimicking him.
It may be useful to create a romantic and/or relationship conflict which evolves in parallel to the general fear that he is the source of the chaos (whether true or not). It may involve flashbacks to his past. You have wide vistas of where to explore your idea. I sometimes find starting with the ending gives me a framework for the middle and beginning. Good luck.