Mason County District Court Magistrate Patricia Baker said the preliminary examinations for Eric and Sarah Knysz have been set for Oct. 11. The hearings originally were planned for Wednesday.
Eric Knysz faces charges of homicide and other felonies. His wife is charged with helping him try to escape.
Trooper Paul Butterfield was shot in the head Sept. 9 during a traffic stop in Sherman Township, about 80 miles north of Grand Rapids.
Eric Knysz also faces weapons, theft and assault charges and Sarah Knysz faces a theft charge in Manistee County, where they were arrested.