American Conspiracy; The Octopus Murders.
...about an Octopus turned CIA operative, that kills on command.
...well, not really.
It's a retrospective, story re. a brave, journalist (his uncovering of nefarious corporate, government & crime intersections in the 70s-80s) whose suspicious, death,led to this doc. On Netflix but threads wained. Fair few good docs on there atm though, imho.
This is a good 'cliff-note' podcast (spoiler obviously.), convo with director & producer, delving into story.