The assailant was said to live with his mother in a nearby suburb, where authorities recently conducted searches of their home. During the investigation, police discovered a nonfunctional pipe bomb in the shooter's residence and evidence indicating plans for a further attack, indicating a potentially larger threat. This tragedy has caused widespread grief across the nation, prompting discussions about gun control and mental health interventions in Austria, a country marked by its low rates of gun violence. As memorials spring up in memory of the victims, the nation mourns while seeking answers.