CRIME

Image of heavily armed Tennessee gunman doesn't square with what those who knew him saw

  • Teen Challenge member, Carol Parker, center, becomes emotional during a memorial service at River Park Saturday, July 18, 2015, in Chattanooga, Tenn., for the victims of the Tennessee shootings.   The U.S. Navy says a sailor who was shot in the attack on a military facility in Chattanooga has died, raising the death toll to five people.  (AP Photo/Mark Zaleski)

    Teen Challenge member, Carol Parker, center, becomes emotional during a memorial service at River Park Saturday, July 18, 2015, in Chattanooga, Tenn., for the victims of the Tennessee shootings. The U.S. Navy says a sailor who was shot in the attack on a military facility in Chattanooga has died, raising the death toll to five people. (AP Photo/Mark Zaleski)  (The Associated Press)

  • U.S. Army Pfc. Nolan Opp visits the memorial for his former classmate and JROTC cadet Skip Wells at Sprayberry High School where they both attended, Friday, July 17, 2015, in Marietta, Ga. Wells was one of four Marines killed in Thursday's shooting in Chattanooga. "What I remember most is that fact that he never put himself before anybody else," said Opp. "He had a huge future. It's just tragic that it ended this way." (AP Photo/David Goldman)

    U.S. Army Pfc. Nolan Opp visits the memorial for his former classmate and JROTC cadet Skip Wells at Sprayberry High School where they both attended, Friday, July 17, 2015, in Marietta, Ga. Wells was one of four Marines killed in Thursday's shooting in Chattanooga. "What I remember most is that fact that he never put himself before anybody else," said Opp. "He had a huge future. It's just tragic that it ended this way." (AP Photo/David Goldman)  (The Associated Press)

  • Boots sits next to an American flag as current and former JROTC students hold a moment of prayer at a memorial to Skip Wells at Sprayberry High School where Wells attended Friday, July 17, 2015, in Marietta, Ga. Wells was one of four Marines killed in Thursday's shooting in Chattanooga. (AP Photo/David Goldman)

    Boots sits next to an American flag as current and former JROTC students hold a moment of prayer at a memorial to Skip Wells at Sprayberry High School where Wells attended Friday, July 17, 2015, in Marietta, Ga. Wells was one of four Marines killed in Thursday's shooting in Chattanooga. (AP Photo/David Goldman)  (The Associated Press)

Investigators have painted a picture of a heavily armed, bearded man massacring two military sites in an attack that left four Marines and the gunman dead. Those who knew him say that doesn't square with the ordinary upbringing they saw.

Muhammad Youssef Abdulazeez died in the attacks, which prompted a gunbattle with police. Neighbors say he was friendly and had been seen dribbling a soccer ball in his yard just days before the killings.

One classmate recalled his sense of humor, evident in a wry quote printed by his yearbook photo. "My name causes national security alerts. What does yours do?"Now investigators are taking a deep look at his online activities and foreign travel, searching for clues to his political contacts or influences.