Suspended Lincolnshire chief constable Neil Rhodes will be investigated by the county's police and crime commissioner following a "detailed assessment" by the Independent Police Complaints Commission.
The IPCC has today released a statement saying it is satisfied the matter requires investigation but that the case "does not amount to serious corruption."
Lincolnshire's new police and crime commissioner Alan Hardwick shocked the county when he suspended Mr Rhodes from duty on February 26. He has appointed Alec Wood as his temporary replacement.
A statement from the IPCC said:"The IPCC has now completed a detailed assessment of the referral of a potential conduct matter concerning the force's temporary Chief Constable, Neil Rhodes.
"The outcome of the IPCC assessment is that we are satisfied the matter requires investigation but does not amount to serious corruption or misconduct which would merit an IPCC investigation.
"The decision to return this matter for local investigation has been communicated to the Lincolnshire Police and Crime Commissioner.
"It will now be for him to determine the way forward. The IPCC has advised that if further concerns come to light in the course of the investigation the matter should be re-referred to us."
Still no reason for Mr Rhodes' suspension has been given.