A Des Moines police officer has been given a three-day unpaid suspension for the death of a police dog in a hot car.

The Des Moines Register says an internal investigation laid out discipline recommendations for Officer Brian Mathis. Harley died Aug. 29 after Mathis left him in an unmarked car at the police station for over an hour.

Mathis won't be eligible for another dog.

Police Chief Judy Bradshaw says Mathis takes full responsibility.

Mathis' car had an alarm system to protect dogs from the heat, but it only works if the car is running. The department will buy a new system that can pop the doors or start the engine and alert officers if temperatures reach a dangerous level even if the car isn't running.