The Naval Criminal Investigative Service (NCIS) has identified Jeffrey Tyrone Savage as the civilian truck driver who killed Master-at-Arms 2nd Class Mark Mayo Monday night onboard Naval Station Norfolk. Savage, 35, from Portsmouth, Va., drove his 2002 Freightliner through Gate 5 just after 11 p.m., proceeded to Pier 1, left his truck and attempted to board USS Mahan (DDG 72). He was confronted by ship security personnel who ordered him to stop. A struggle occurred and Savage was able to disarm the petty officer of the watch. Savage then used the weapon to fatally shoot Mayo and attempted to fire at other nearby security personnel. Mayo was serving as chief of the guard at Naval Station Norfolk and was in the vicinity of the Mahan. Mayo immediately came to render assistance to personnel on Mahan and engaged in gunfire with Savage. Other security forces shot and killed Savage. Savage, an employee of Majette Trucking, did have a valid Transportation Worker Identification Credential (TWIC). A TWIC alone does not authorize base access, it must be used in conjunction with other documents to gain authorized entry. The NCIS investigation has confirmed that Savage had no reason or authorization to be on Naval Station Norfolk. The chain of events that allowed Savage entry to the installation and the ship are under investigation.