(Jessica Hill | Associated Press file photo) In this Jan. 28, 2013, file photo, firearms training unit Detective Barbara J. Mattson, of the Connecticut State Police, holds up a Bushmaster AR-15 rifle, the same make and model of gun used by Adam Lanza in the Sandy Hook School shooting, during a hearing of a legislative subcommittee in Hartford, Conn. Connecticut is one of five states that have passed "red flag laws" that allow the seizure of guns before people can commit acts of violence.