John Moore-Robinson died hours after being discharged from hospital
A man whose son died after being sent home from hospital with a ruptured spleen wants police to investigate.
Frank Robinson made the call following the death of John Moore-Robinson, 20, in 2009 after Stafford Hospital said he only had injured ribs.
A Mid-Staffordshire NHS Foundation Trust executive was suspended for allegedly trying to suppress a report criticising his treatment.
The trust said it would co-operate with any police investigation.
Mr Moore-Robinson was injured in a mountain bike accident.
An X-ray revealed he had broken ribs, but no scan was done to check his spleen and he was prescribed painkillers and discharged. He died hours later.
Mr Robinson, of Coalville, Leicestershire, said he and his wife Janet felt unless people were held to account for the "terrible, terrible happenings" at the hospital then confidence in it would not be restored.
He said: "We feel the chief constable should now immediately start a criminal investigation into the happenings both on the legal department at Mid-Staffordshire A&E and into the treatment and care of our son, because we feel it was criminally negligent."
Trust secretary Kate Levy was suspended in January for allegedly trying to have a damning internal report into Mr Moore-Robinson's death rewritten to avoid adverse publicity.
Janet and Frank Robinson want a police investigation
Despite having flagship foundation status, the trust has been at the centre of a storm of criticism over care standards.
Earlier this month it was told by the Care Quality Commission to improve or face action.
Trust chief executive Antony Sumara said: "We quite understand why Mr Robinson might want a police investigation and we will help the police in any way we can.
"Our own investigation is currently being carried out and we will be sharing the results with Mr and Mrs Robinson."
A spokesman for Staffordshire Police said the force had yet to receive a complaint.
"It would be inappropriate to comment in any detail but we would obviously give it careful consideration," he said.