Wichita ? A Kansas prosecutor who tried a case against a slain Kansas abortion provider is trying to throw out a subpoena by attorneys for the man who has confessed to killing the doctor.

Deputy Attorney General Barry Disney asked a judge Thursday to quash the subpoena filed by lawyers for Scott Roeder of Kansas City, Mo. Roeder is on trial in Wichita, charged with first-degree murder for the May 31 killing of Dr. George Tiller.

Two months before his death, Tiller was acquitted of 19 misdemeanor counts of failing to obtain a second opinion from an independent physician before performing late-term abortions.

Disney said in court papers he has no personal knowledge of any facts relevant to Roeder’s case. He also argued the subpoena seeks protected attorney work product.

Jury selection in Roeder’s trial continued Thursday behind closed doors.