A battle for justice - Part 1 - S5.E5

A female local politician has been murdered in the Thai boxing club. When Dan and Flemming arrive at the scene, they discover that the blood from the deceased forms a pattern of a butterfly, resembling the club logo. The first to be interrogated in the case are the deceased's group of friends, who train in the same club. And they are not afraid to lie to each other nor to the police.