I watched the three episode Don’t F**k with Cats on Netflix. It is really good, hard to watch at times, but a great crime solving story. I give this true crime documentary 4.8 out of 5 stars.
[From Wikipedia] Don’t F**k With Cats: Hunting An Internet Killer is a 2019 true crime documentary series about an online manhunt. It is directed by Mark Lewis and was released on Netflix on December 18, 2019. The limited series follows a group of internet sleuths who launched a manhunt for Luka Magnotta, after he gained international notoriety in 2010 for sharing a graphic video online of himself killing two kittens. Magnotta was later convicted for murdering Chinese international student Jun Lin in grisly circumstances.