Carver police officer David Harriman dove into eight feet of murky water last weekend to rescue a dog trapped in a truck at South Meadow Village, a residential community for those aged 55 and older. Responding to a call for assistance at 3:40 p.m. June 7, officers Segisfredo Melo and Harriman discovered a 2004 Toyota Tacoma pickup truck completely submerged in a freshwater pond. The operator, Debra Titus, 59, of Plymouth mistakenly left the car in reverse, and it rolled into the water. Titus and one of her two dogs were able to escape on their own, but the other dog was trapped inside the pickup. Harriman, a dog lover, removed his gun belt and dove into the water. He got a door open on the submerged pickup and was able to retrieve the dog and return it to Titus. According to police, the dog was in good health, but a little frightened.