The SUV with tinted windows sped around Sigler Park, prompting two police cars to pursue the vehicle onto the park’s field. Out jumped two suspects — one forcing a hostage to a nearby bus. Just then, K9 Officer Travis Hartman unleased his dog, Pako. After a warning from Hartman, Pako chased the suspect and nabbed the bad guy. Onlookers screamed with great enthusiasm. “Get the bad guys!” “There’s the attack dog!” “Ohhhh, the helicopter is coming!” The scene was a realistic reenactment of a police pursuit and hostage situation during Westminster Police Department’s annual Safety Day, held July 18. Orange…