Authorities: Munich shooter planned attack for a year

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 Friday's attack in which he killed nine people and wounded some three dozen others before taking his own life.

In the aftermath of Friday's attack, Bavaria's top security official urged a constitutional change to allow the country's military to be able to be deployed in support of police during attacks.

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

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 hunted for the shooter.

Even though it was an illegal weapon, Vice Chancellor Sigmar Gabriel suggested Sunday that even stricter controls on legal access to weapons are 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."