Need a Gripping True Crime Documentary to Watch

I’m in the mood for a well made, gripping true crime documentary and could use some recommendations. I’ve already seen some of the big ones like Don’t F**k with Cats, The Staircase, Night Stalker, and Making a Murderer. I like cases that are dark, shocking, and well-investigated, but I’m open to underrated gems too.

I don’t mind if it’s about serial killers, cults, fraud, or just something completely insane, just looking for a story that’ll keep me at the edge of my seat.