Police officer's daughter dies after 'overheating in back of patrol car while she visited male colleague

An American police officer's three-year-old daughter has died after being left unattended in a patrol car while her mum visited the home of a male colleague.

Cheyenne Hyer was pronounced dead in hospital on Friday after being left in the vehicle, which had been running for four hours.

Her mother Cassie Barker and fellow office Clark Ladner, who work for Hancock County Police Department in Mississippi, have both been suspended following the launch of an investigation.Glenn Grannon from the sheriff's department said the cause of death appears to be overheating, even though the air conditioning was running in the patrol car when police found it Friday afternoon,NY Daily reported.