From the article, it's the mother of one of the teens who has stated that they were innocent, and attacked by a man with a knife. The police received two calls, one claiming the teens were threatened, another claiming they were the aggressors and hit someone with a skateboard.When three teens were allegedly threatened by an armed man, the responding officers turned their guns on them, mother says | CNN
Bystanders called police when three teens -- two of them Black -- were allegedly attacked by a knife-wielding man as they sat at a bus station in California's Santa Clarita Valley, according to the mother of one of the teens.cnn.it
I can see why the teens were detained, but it seems way overboard for the cops to arrive and draw guns so aggressively, I don't see the need for three guns drawn in that situation. I wonder what spooked them so badly? You'd think that they had arrived on the scene of a shooting or something. Scary for those teens.