Former Ramsey County Sheriff Bob Fletcher has spent months criticizing the current sheriff.
He's attacked Sheriff Jack Serier on everything from staffing at the county jail to his residency.
On Tuesday, Fletcher put his words into action and announced he'll run for his former job.
Mike Martin, assistant director of emergency management for the University of Minnesota, pulled out of the race and said he'll support Fletcher's campaign.
"I just didn't get the traction that I think I need to be able to move forward in the process," Martin said.
"[Fletcher] has the experience running the sheriff's office. He has support internally in the sheriff's office."
Martin said he will work on Fletcher's campaign but that there has been no talk of whether he would be brought into the Sheriff's Office should Fletcher win.
Fletcher's goals include reforming detention practices, "immediate" use of body cameras, creating new ways to hire officers who don't have previous experience in the field and promoting more women into leadership roles.