Munich gunman spent over a year planning mass shooting, police say

The teenager behind Friday's deadly shooting rampage at a Munich mall had planned his attack for a year and chose his victims at random, investigators said Sunday.

Bavarian investigator Robert Heimberger said the shooter, an 18-year-old German-Iranian identified only as David S., visited the site of a previous school shooting in the German town of Winnenden and took photographs last year, then set about planning the attack in which he killed nine and wounded some three dozen others before taking his own life.

"He had been planning this crime since last summer," Heimberger told reporters.

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He said there were "many more terabytes" of information to evaluate, and that the teenager's brother and parents were still not emotionally up to being interrogated by police.

There is so far no evidence that he knew any of his victims, or that there was any political motivation behind the attack, said ThomasSteinkraus-Koch, a spokesman for the Munich prosecutors' office.

The suspect received both inpatient and outpatient psychiatric treatment last year to help him deal with "fears of contact with others,"Steinkraus-Kochadded. He said medication had been found at his home but that investigators needed to talk with his family to determine whether he had been taking it.

16-year-old friend of shooter arrested

German police arrested an unidentified 16-year-old Afghan youth on Sunday on suspicion of a connection to the shootings.

The youth was under investigation for possibly having failed to report the plans of the gunman, who later shot himself, and may have played a role in a Facebook posting that invited people to a meeting near the Munich train station, a police statement said.

"There is a suspicion that the 16-year-old is a possible tacit accomplice to (Friday's) attack," it said.

Call to loosen military restrictions

Bavaria's top security official on Sunday urged a constitutional change to allow the country's military to be able to be deployed in support of police during attacks like Friday night's deadly rampage at a Munich mall, while Germany's vice chancellor proposed even stricter controls on firearms.

Because of the excesses of the Nazi era, Germany's post-war constitution only allows the military, known as theBundeswehr, to be deployed domestically in cases of national emergency.

But state Interior MinisterJoachimHerrmanntold Welt amSonntagnewspaper that the regulations are now obsolete and that Germans have a "right to safety."

"We have an absolutely stable democracy in our country," he said. "It would be completely incomprehensible ... if we had a terrorist situation like Brussels in Frankfurt, Stuttgart or Munich and we were not permitted to call in the well-trained forces of the Bundeswehr, even though they stand ready."

Munich deployed some 2,300 police officers to lock down the city Friday night, calling in elite SWAT teams from around the country and neighbouring Austria, after an 18-year-old went on a shooting rampage at a mall with a pistol, killing nine and wounding dozens of others before taking his own life.

It was the second attack targeting victims apparently at random in less than a week in Bavaria. On Monday, a 17-year-old Afghan asylum-seeker wounded five people in an ax-and-knife rampage near Wuerzburg, for which the Islamic State group has claimed responsibility.

In the fog of the Friday attack, witnesses had reported as many as three shooters and the city's public transit was completely shut down for hours as authorities searched the streets.

Herrmann said that in other European nations it goes without saying that the military is brought in to aid during "extreme domestic threats" and he said Bavaria would urge changes so that it is allowed in Germany as well.

Stricter gun laws

Weapons are strictly controlled in Germany and police are still trying to determine how the shooter, a German-born man identified only as David S. whose parents are Iranian immigrants, obtained the Glock 17 used in the attack.

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Its serial numbers were filed off and he had no permit to purchase weapons, authorities have said.

Even though it was an illegal weapon, Vice-Chancellor Sigmar Gabriel suggested Sunday that even stricter controls were needed, telling the Funke Media Group that "we need to do everything further possible to curb the access to deadly weapons and strictly control them."

"How can it be that an unstable, or possibly even mentally ill 18-year-old comes into possession of a firearm?" he asked.

Germany's top security official, Interior Minister Thomas de Maiziere, said, however, that Germany's weapons regulations were already "very strict" and appropriate.

He said authorities first need to determine where the shooter got the weapon from.

"We'll then have to look very carefully at whether there then needs to be a possibility for additional legal action," he said.