Police say the man found dead inside an apartment on Bolling Drive in Bangor on Tuesday killed himself. The medical examiner has determined the man died from a self-inflicted gunshot wound. Bangor police say a woman told them she and her son ran out of the apartment Tuesday afternoon when a man brandished a gun during an argument. The woman told police she heard a gunshot when she was running away. The Bangor Police Special Response Team responded, sending a robot into the building to get a closer look at the area. When police went inside, they found the man dead in a bedroom.