A police dog handler is facing a disciplinary hearing following an investigation by the Independent Police Complaints Commission (IPCC).
Pc David Smedley was cleared of unlawful wounding in June by Bolton Crown Court following an incident outside the Crown Inn pub in Stockport.
Christopher Perkins alleged he was bitten by the officer's dog.
The IPCC said it has directed Greater Manchester Police to take disciplinary action against Pc Smedley.
The action follows an incident on the 16 March 2003 which was referred to the Police Complaints Authority (the IPCC's predecessor).
Following Pc Smedley's acquittal, Greater Manchester Police and the IPCC had to decide whether an internal investigation should take place into misconduct allegations.
An IPCC spokesman said the hearing would centre on whether the officer showed a lack of control over his dog.