DENVER -

Denver Sheriff Gary Wilson is stepping down following a string of allegations of excessive force at the city's jail and wrongdoing by commanders.

Mayor Michael Hancock announced Monday that Wilson will be temporarily replaced by Division Chief Elias Diggins. The city will launch a national search for a new sheriff.

Hancock says the city will also review how well the department's internal affairs bureau investigates accusations of misconduct and explore ways to expedite the disciplinary process.
    
A federal judge has asked the Department of Justice to investigate the sheriff's office over claims in a jail-abuse lawsuit. A top official was indicted in April on felony theft charges, and last week a video recording appeared to show a deputy punching an inmate.
    
Denver's approximately 890 employees are responsible for running the city's two jails and providing courtroom security.