Investigation concludes lone gunman acted without accomplices in Austrian school shooting

Austrian authorities have concluded their investigation into a school shooting at a gymnasium in Graz, determining that the perpetrator acted alone without accomplices. The incident occurred nearly a year ago when a former student opened fire at the school, killing nine students and one teacher. The shooting represents one of Austria's deadliest school attacks in recent memory, shocking the local community and prompting discussions about school security measures across the country.