The Brady Campaign to Prevent Gun Violence and Arizonans for Gun Safety bring a short film about a survivor of the Virginia Tech massacre to Tucson tonight.

Virginia Tech, slow to react during the 2007 shooting rampage by a depressed student, was quick to use an alert system during today's shootings, students and authorities said.

The Virginia Tech shooting on April 16, 2007, was one of them. NewsNation's "Banfield" takes you back there in this week’s True Crime Rewind.