Union County (TN) Sheriff's Office K-9 Josey, a 7-year-old bloodhound, was found unresponsive Sunday by her handler. They rushed her to the UT College of Veterinary Medicine in Knoxville, but vets were unable to revive her. They believe she died of a previously undetected medical condition.

"She was one of those once in a lifetime dogs that taught you so much," said K-9 Deputy Marvin Carter. His wife, K-9 Deputy Missy Carter, was Josey's handler. In addition to their work with the Union County Sheriff's Office, the two work together to train search and rescue dogs and assist other counties when needed.

Josey was trained to track and also to find human remains, WBIR TV reports.

Josey was great with kids, said Carter, and visited a lot of school and community groups and events.