Friends say Chattanooga shooter was changed by trip to Middle East

FBI investigators work the scene of the July, 16 shooting at the Naval Operational Support Center on Amnicola Highway on Saturday, July 18, 2015, in Chattanooga, Tenn. U.S. Navy Petty Officer Randall Smith died Saturday from wounds sustained when gunman Mohammad Youssef Abdulazeez shot and killed four U.S. Marines and wounded two others and a Chattanooga police officer at the Naval Operational Support Center shortly after firing into the Armed Forces Career Center on Lee Highway.
photo Mohammad Youssduf Adbulazeez, the shooter in Chattanooga attack on military facilities that left 6 dead and 2 wounded, including the dead shooter, is pictured as a mixed martial arts fighter.

Something happened to Mohammod Youssuf Abdulazeez after he traveled to the Middle East to spend time there, according to several credible reports.

"He never became close to me like he was before he went overseas. ... I'm sure he had something that happened to him overseas," said Abdulrazzak Brizada, who described himself to CNN as a friend.