Audio books of mystery novels

Yes!! This Sounds Serious is a Canadian fake-true-crime comedic podcast. I listened to both seasons when they came out and loved every episode. Everybody in-universe takes everything deadly-seriously, but the writing is very tongue-in-cheek.

I'm pretty bummed they haven't made anything new in a while, but I think the pandemic probably threw a wrench in the gears for the third season and they've moved on to other things.

I think Who shat on the floor at my wedding? comes close. While it is a "true" crime, the stakes are comically low and nobody gets hurt.

Not exactly what you asked, but cree journo Connie Walker has made a few podcasts about crimes comitted against indigenous people. The topic is reprehensible but the podcasting part is not.

She recently won a pulitzer and a peabody award for a documentary about residential schools, particularly those attended by her late father and his family.

https://gimletmedia.com/shows/stolen/

https://en.m.wikipedia.org/wiki/Connie_Walker_(journalist)