GARDEN GROVE—A pickup truck being chased by Garden Grove police March 12 crashed into another vehicle and ended up in a residential swimming pool, killing both motorists, authorities said. About 2:15 a.m., officers saw the driver of the Dodge Ram pickup “driving at a high rate of speed” through a parking lot at Chapman Avenue and Harbor Boulevard, said Garden Grove police Lt. Mario Martinez. “The truck exited the parking lot onto Chapman Avenue, where it continued to drive at a high rate of speed,” Martinez said in a statement. “The officer activated his red lights and siren in an attempt to catch the truck as it traveled westbound on Chapman Avenue. “The truck continued driving at a high rate of speed when it was involved in a traffic collision with another passenger vehicle at the intersection of Euclid Street and Orangewood Avenue,” Martinez said. “As a result of the collision, …