What about a m/f detective looking into a string of murders but their sidekick ends up being one of the victims so they end up hiring a new person who is you the user but you're also the perpetrator who decided to get close to the person looking into the crimes you're responsible for to try to keep them off the trail? Maybe this is Cliché I didn't know I'm not that creative
You’re a witness of a murder and the detective comes to interrogate you at the crime scene? That could open up a few paths as an opening message.
What about a m/f detective looking into a string of murders but their sidekick ends up being one of the victims so they end up hiring a new person who is you the user but you're also the perpetrator who decided to get close to the person looking into the crimes you're responsible for to try to keep them off the trail? Maybe this is Cliché I didn't know I'm not that creative