shooters, which unfortunately is common language in law enforcement, that wasn't part of our vocabulary in 1992. so it's not something we had trained for. >> the lindhurst shooting wasn't the first of its kind or the last. >> the teenagers killed 12 students and a teacher at a littleton, colorado school, before committing suicide. >> 30 people have been killed in this rampage at virginia tech university. >> just minutes after the shootings at sandy hook elementary school, radio transmissions reveal the scale of the tragedy already unfolding. >> today a school shooting happens almost every week in the united states. in 1993, officers stacy koon and lawrence powell were convicted in federal court for their role in the rodney king beating. >> at least he was able to be a symbol of change and a symbol of hope for people. he was our hero, my sister's and myself. >> the city realized it had to make stronger connections, and the police department had to