The Raincoat Killer: Chasing a Predator in Korea (2021)

Both are documentary based on criminals and victims that really happened in Korea. Also, the witness and the interviews are real and some moments are recreated using real people and animation

In the Name of God: A Holy Betrayal and The Raincoat Killer: Chasing a Predator in Korea are both netflix true crime documentary series happened in Korea.

as some of you might know, the story of Yoo young chul is real~ this documentary follows the incidents of early 2000s in Korea. if you want to know more about the cases and how criminal behaviour analysis became a thing in Korea, this documentary is totally recommended!
through the darkness and the raincoat killer are both based on the same story

The Chaser (Korean: ???; RR: Chugyeokja) is a 2008 South Korean action thriller film starring Kim Yoon-seok and Ha Jung-woo. It was directed by Na Hong-jin in his directorial debut.[4] Inspired by real-life Korean serial killer Yoo Young-chul, certain scenes were shot on location around Mangwon-dong in the Mapo District, Seoul.