When a caravan of police cars rolls onto a scene, people usually head in the other direction. But on this particular December day, kids flocked toward the police, who had a pickup truck stuffed with holiday gifts. The informal and unannounced event was created about five years ago, according to Santa Ana Police Chief David Valentin, as a way to further connect with the community during the holiday season. The event is also kept under wraps until the police arrive on site. “I think it’s a unique approach because it’s not expected,” Valentin said. “This is spontaneous.” While planned and…