MADISON, Wis. (AP) – A subpoena has been filed with the court requiring Gov. Scott Walker to testify in the trial of a former Milwaukee County staffer.

Kelly Rindfleisch is accused of using county time to conduct campaign work for a Republican who lost a lieutenant governor race in 2010. Rindfleisch was Walker’s deputy chief of staff when he was the Milwaukee County executive.

She’s pleaded not guilty to four felony counts of misconduct in office.

WKOW-TV reports the subpoena has been served on Walker’s attorney, Michael Steinle, and has been filed with Milwaukee County Judge David Hanscher.

Walker was previously identified by a prosecutor as a potential witness in the Oct. 15 trial. Rindfleisch is one of six Walker associates facing charges that arose from a secret investigation.

Information from: WKOW-TV, http://www.wkow.com