The teenage gunman who killed nine people in Munich on Friday had been planning his attack for a year, German authorities say.
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Heimberger said the gunman likely purchased his weapon – a reactivated Glock 17 pistol – on the shadowy dark net area of the Internet.
The youth was under investigation for possibly having failed to report the plans of the gunman, who later shot himself, a police statement said.
A spokesman for the Bavaria state prosecutor’s office also said the victims of the shooting were not classmates of 18-year-old student David Ali Sonboly.
He said Sonboly spent a lot of time playing video games in which he was the shooter, including “Counter-Strike: Source”.
The family of the attacker is still in shock of what happened, while the police did not manage to interrogate his parents so far. “I tried talking to him while the shooter continued his rampage, and I thought, ‘I’m next'”. Winnenden was the site of a 2009 school shooting, according to the BBC.
The shooting shook Europe after a spate of recent terror attacks on the continent, including the stabbing of passengers on a German train by a man who claimed to be inspired by ISIS and the killing of 84 people in a truck attack in Nice, France.
Law enforcement officials piecing together a portrait of the 18-year-old shooter said he was seeing a doctor up to last month for treatment of depression and psychiatric problems that began in 2015 with inpatient hospital care followed by outpatient visits.
Vigils are continuing in Munich to commemorate the victims, seven of whom were teenagers.
Investigators said the shooter appears to have hacked a young woman’s Facebook account and posted a message luring people to the mall where he carried out the shooting, HuffPost Germany reported.
Six of the nine victims had a non-German heritage, police said earlier on Sunday.
They were two 14-year-old Kosovan girls, Armela Segashi and Sabina Sulaj, and their Turkish friends Can Leyla, 14 and Selcuk Kilic, 15.
On Sunday, authorities raised the number of injured people from two dozen to 35.
“At the crime scene 58 shells were found”, he said.
Sonboly was obsessed with Anders Behring Breivik, whose massacre of 77 people in Norway came exactly five years before his own shooting spree.
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Sonboly appeared to have been the victim of bullying by fellow pupils back in 2012, filing a complaint against three of his tormentors.
