Autopsy shows that Gerald Pickering took his own life with a gunshot to the head . A man who ambushed firefighters Monday , fatally shooting two of them as they arrived to put out a raging inferno in upstate New York , took his own life with gunshot to the head , according to an autopsy conducted by the Monroe County Medical Examiner 's Office . He killed four firefighters as they arrived to put out a raging inferno in upstate New York . Authorities say they do n't know how Spengler , Monday , obtained the weapon or weapons he used .
Autopsy shows that Gerald Pickering took his own life with a gunshot to the head . He killed four firefighters as they arrived to put out a raging inferno in upstate New York . Authorities say they do n't know how Spengler , Monday , obtained the weapon or weapons he used .