In a Facebook post, Sheriff Chad Bianco said Sergeant Harry Cohen died Sunday after suffering "what appears to be a heart attack while training with the K-9 team."
Cohen spent "many years" with the K-9 team and was a supervisor, according to Bianco.
"Last night our department lost a man of God, husband, father, best friend and deputy. Sergeant Harry Cohen will be deeply missed by everyone who knew him," Bianco wrote.
Details on a public funeral service have not been released.