Had a weird idea for a murder mystery twist and it feels like the sort of thing I need to get out of my head or it will bop around in my brain forever, annoying me. As I am not a writer, I figured I'd just post it here.
Idea is this: murder happens in a factory. There is a lot of evidence pointing to one person being the culprit, but no one saw it happen. However, the apparent murderer has an airtight alibi for the time of the murder. Turns out it actually was an accident, but the plant manager is obsessed with the "## days without an accident" record and if he can get it classified as a murder, then the record remains intact (at least that's his rationale behind the framing).
The manager had come up through the IT ranks before being promoted to plant manager and no one had ever revoked his server credentials. This allowed him to get in and manufacture emails between the victim and accused to make it looks like they were feuding and delete security recordings, stuff like that.
Anyway, that's it. Kinda simplistic once I type it out, probably even something out there has already done this and I'm just pulling up those memories without fully recalling everything.