The metal detectors, bag searches and armed bailiffs that are standard in courthouses today—this is where it started.

In a courtroom in San Rafael, California in 1970, during a trial involving inmates from San Quentin prison. A spectator smuggled in guns—weapons purchased by counterculture activist Angela Davis. The inmates took Judge Harold Haley, prosecutor Gary Thomas and three women jurors hostage, herding them into a getaway van.

In the ensuing gun battle, Haley was killed and Thomas—who managed to grab a weapon from one of his captors, and shot three of them—was left paralyzed from the waist down.