The Sommerdahl Murders (2020)

S5E5 A battle for justice - Part 1

A local female politician has been found dead at the Thai boxing club. When Dan and Flemming get to the scene, they notice that the blood from the victim has created a butterfly shape, mirroring the club's logo. The initial suspects are her circle of friends, all of whom train at the same facility. They prove to be untrustworthy, readily deceiving both one another and the authorities during questioning.