Let's Sin (movie, 2014)

Selman is a former boxer who once was interested in anthropology, an extraordinary imam who now works in a mosque. One day, while praying in the mosque, gunshots are echoed. One of the people inside collapses and dies. The police come to the scene and collect the first evidence and start the investigation process. He takes action after this event and decides to resolve the case through some people and circumstances he suspects. Every clue leads to an unexpected point and the events become increasingly mysterious.