DETAILS ON MASSACRE GUNMAN

Palestinian Attacker, from Eastern Jerusalem, Was Driver at School; Family Flies Hamas Flag (AP/USA Today)
Israeli defense officials said the gunman who attacked the school came from eastern Jerusalem, whose Palestinian residents have Israeli ID cards that give them freedom of movement in Israel, unlike Palestinians in the West Bank and Gaza.

Several residents of the neighborhood of Jabel Mukaber gave his name as Alaa Abu Dhein, 20, and said he had worked as a driver at the school.  His family set up a mourning tent Friday and hung green Hamas flags outside their home.    Abu Dhein was arrested by Israeli authorities four months ago and then released two months later, they said.

See also Terrorist Confirmed His Kills- Amnon Meranda (Ynet News)  

Ariel Dela Rosa, 28, who was lightly injured in the attack, said the terrorist confirmed his kills.    "He yelled 'Allahu Akbar.' I think he confirmed some of the kills. When I left the room I saw that the bodies had been shot in the head."