YPD Sergeant Mike Henne was Lektor's handler before adopting him. Henne says the K-9 helped find hundreds of suspects and evidence.
He says it's been hard coping.
"To go downhill is really, really difficult," said Sergeant Mike Henne. "But still I look back at it as that was the highlight of my career so far was the time I spent working with my dog."
Lektor started working with YPD when he was about a year and a half. Donations paid to bring the K-9 officer to the force. Lektor was 16 years old.