Three Midland police staff will face disciplinary action for the way they dealt with a woman found dead in a street.
An investigation by the Independent Police Complaints Commission (IPCC) found an officer from Warwickshire Police and two colleagues failed to respond quickly enough to the spot where Margaret Maloney lay dead on December 7, 2004.
It was suspected that Ms Maloney had taken an overdose and collapsed outside Ridgeway Chemist's in Rugby.
Officers logged the incident and started an investigation into the death.
An inquest into Ms Maloney's death, held at Rugby Coroner's Court, found that she had died of natural causes.
However, the IPCC said that had the death been suspicious, evidence would have been lost because of the delayed response of the force.
John Crawley, from the IPCC, said: "Whilst it has been established that Margaret Maloney died of natural causes, had the circumstances of her death been suspicious the opportunity to recover evidence from a crime scene would have been lost.
"The police response to the discovery of Ms Maloney's body fell well below the required standard.
"The cumulative failings of the communications staff and the police sergeant led to an unacceptable delay in the deployment of police resources resulting in no initial police attendance, no scene preservation and a delayed investigation into the cause of her death."
As a result of the investigation Warwickshire Police will review its "team-work", communications systems and the way it categorises calls.