Northamptonshire Police Chief Constable Adrian Lee is being investigated over allegations of misconduct, the county’s police authority has confirmed.
Mr Lee is among four former and serving senior Staffordshire Police officers being investigated by the Independent Police Complaints Commission (IPCC).
The IPCC probe concerns the Staffordshire force’s handling of the gangland murder of Kevin Nunes in 2002.
Five men were jailed in connection with the killing in 2008.
Northamptonshire Police Authority confirmed that Deputy Chief Constable Suzette Davenport was also being investigated.
An IPCC spokesman said: “We can confirm the Independent Police Complaints Commission is managing an investigation into allegations against a number of former and serving Staffordshire Police officers.
“The investigation is being carried out by the Chief Constable of Derbyshire Mick Creedon under the direction and control of the IPCC. His investigation began following a request from the Criminal Cases Review Commission who are conducting an inquiry on behalf of the Court of Appeal in relation to an ongoing appeal.”
A spokesman for Northamptonshire Police Authority said: “We can confirm that allegations have been made in relation to Chief Constable Adrian Lee and Deputy Chief Constable Suzette Davenport, who both served in Staffordshire Police. The authority has considered information provided by the IPCC and remains completely confident in both the chief constable and deputy chief constable.”