Assistant Commissioner of Police of the Metropolis, usually just Assistant Commissioner (AC), is the third highest rank in London's Metropolitan Police, ranking below Deputy Commissioner and above Deputy Assistant Commissioner. There are usually four officers in the rank. However, as of March 2022 there are five due to the continuing secondment of Assistant Commissioner Rob Beckley to Operation Resolve, the criminal investigation into the Hillsborough Disaster. There have also at times been five in the past.