Milwaukee County Sheriff David Clarke has resigned, the Milwaukee County Clerk told CBS affiliate WDJT.
The resignation will go into effect at 11:59 p.m. Thursday.
Christenson said Thursday that he received a resignation letter from Clarke. Christenson says the letter didn’t give the reason for Clarke’s resignation.
Clarke has not yet responded or made a public statement.
Clark has been sheriff of Milwaukee County since 2002 and spent more than two decades before that with the Milwaukee Police Department. Governor Scott Walker said they will move forward with filling the position as soon as they are formally notified.