Study: Many Mass Shootings Over Before Help Arrives

Study:  Many Mass Shootings Over Before Help Arrives
FILE - In this file photo of Jan. 28, 2013, members of the Washington County Sheriff's Office, the New York State Police and Hudson Falls Police Department approach the entrance to the Hudson Falls Primary School in Hudson Fall, N.Y., to practice drills with unloaded guns to prepare for the possibility of armed intruders at the school. School security has come under more scrutiny in the wake of the Sandy Hook Elementary School massacre in Newtown, Conn., that killed 26 people in December. (AP Photo/The Post-Star, Omar Ricardo Aquije, File)

A recent study by Texas State University found that many mass shootings are over before can arrive. ABC News Crime and Terrorism analyst Brad Garrett says on average it takes officers three minutes to get to a mass shooting.