(CNN)—The teen gunman who killed nine people in a shooting rampage in Munich on Friday was a mentally troubled individual who had extensively researched spree killings and had no apparent links to ISIS, police said.
Speaking at a press conference in the southern German city Saturday, police officials said the 18-year-old lone attacker — who died of a self-inflicted gunshot wound — had no political motivations, and no references to religion had been found in documents in his home.
Rather, investigators searching his belongings found numerous documents on rampage killings, including a book entitled “Rampage in My Mind — Why Students Kill,” said Robert Heimberger, president of the Bavarian State Criminal Police Office.
Neigbhors told CNN that the 18-year-old who lived in the apartment searched by police was Ali Sonboly. CNN’s Atika Shubert interviewed people who live in that building. In a press conference Saturday, German police said the gunman’s parents had been taken in for questioning.
Police have not named the attacker, but said he had dual German and Iranian nationality and was born and raised in Munich.