he used a 45-caliber pistol that he recently purchased. it was not registered on base. he died tonight by self-inflicted gunshot wound to the head. >> at this point his next of kin have not been notified, so i'm not going to confirm his name. we do have his name, but his next of kin have not been notified. >> was he suffering from ptsd? >> he was under diagnosis but had not been diagnosed. he was undergoing behavior, health and psychiatric treatment for depression and anxiety in a variety of other psychological and psychiatric issues at. >> that is really all we know. the community of colleen, texas, is dealing with another mass shooting.