A ban on dozens of semi-automatic rifles has cleared the Democratic-controlled Washington state Legislature.

In previously unreleased interviews, police who responded to the Robb Elementary shooting told investigators they were cowed by the shooter’s military-style rifle. This drove their decision to wait for a Border Patrol SWAT team to engage him, which took more than an hour.

Experts weigh in on what they believe could slow down and prevent the ongoing gun violence in this week's KSAT Explains episode.

The use and sale of the AR-15 semiautomatic rifle have been in the public eye after the tragedy at Robb Elementary School in Uvalde late last month that left 21 people dead.