The effort to find a man who walked onto Brown University’s campus and shot nearly a dozen students in a crowded lecture hall has raised serious questions about the school’s security systems and the urgency of the investigation itself.

Law enforcement is pleading with the public to help in the manhunt, releasing additional images, requesting any new details or observations and offering a reward.

Criminal profiler calls Brown University a "soft target" after weekend shooting that killed 2 students. The gunman exploited unsecured doors and limited cameras.

Brown was the site of a deadly shooting that killed two and sent nine more to the hospital on Saturday, Dec. 13.

By Rich McKay and Helen Coster Dec 15 (Reuters) - One student dreamt of becoming a neurosurgeon after surviving brain surgery as a child. The other was hailed by friends at an ice cream shop where she worked as destined for greatness.

Students Ella Cook and Mukhammad Aziz Umurzokov identified as victims killed in Brown University shooting that wounded nine others over the weekend.

Senior administration officials released confusing, incorrect or misleading information after Kirk's assassination and the shooting of two National Guard members.