A retired police K-9 in Saratoga County is being mourned. Jagger worked with Deputy Nic Denno from 2015 to 2019, and was living with Denno’s family. Jagger was trained in patrol tracking and narcotics detection, according to the Saratoga County Sheriff’s Office. Jagger died at the vet on Monday after a medical emergency. He was 9 years old.