Television have a looooot of true crime documentaries, so these are just the ones i watch.
Jonestown: Terror in the Jungle
The Keepers
Life and Death Row
Love and Hate Crime
Making a Murderer
Ministry of Evil: The Twisted Cult of Tony Alamo
Murder on Middle Beach
The Sons of Sam: A Descent into Darkness
The Staircase
This is a Robbery: The World's Biggest Art Heist
A Very British Murder with Lucy Worsley
Village Of The Damned
