The investigation centered on Mehmet Altun as the murderer,[1] who was apprehended on 4 August 2021.[8] The same day, ten of the fourteen detained members of Altuns family were arrested.[8] Four others were released but prohibited to travel abroad.[8] According to Bianet Mehmet Altun has admitted to have killed the family members. He has also admitted to have attempted to set the fire ablaze, in order to erase the recordings of the security camera.[3]