I'm inclined to say no. 'Love and Murder Atlanta Playboy' sounds like a concocted storyline rather than something that happened in reality. Maybe it takes some loose inspiration from real cases, but it's not a straightforward true account.
Yes, 'Memories of a Murder' is based on a true story. It is set against the backdrop of South Korea's first serial murders in history. The movie tries to portray the real - life investigation of those murders.
The Murder 101 podcast is purely fictional. It's crafted to engage the audience with an interesting narrative but has no basis in real events. The creators use their imagination to come up with the storylines and characters.