Time. In july 1998 a delusional, seriously mentalally ill man walked through carrying a loaded. 38 caliber smith and wesson revolver. Jacob chestnut stopped the man and asked him to go through the metal detector. The man turned and shot the officer in the head and killed him and shot and Wounded Another Police officer. Officer Douglas Mcmillian who Returned Fire and hit the attacker. Shot and mortally wounded a u. S. Capitol police detective. John gibson. As gibson told members of congress and their staff to take cover. Detective gibson was killed by the attacker that day. But before he died he nevertheless was able to return fire as well and that is apparently what took the gunman down and ended that oneman attack on the u. S. Capitol in the summer of 1998. The attacker, although he was shot by officers that Returned Fire, he survived. A u. S. Senator, who was a Heart Surgeon was nearby when the Gun Fight Broke Out and may have saved the gunmans life after the shooting stop and accomp