SKOWHEGAN — The state’s chief medical examiner testified this morning that 20-year-old Rita St. Peter died as a result of blunt impact injury to the head and chest.

Dr. Margaret Greenwald said that the autopsy report by then chief medical examiner Henry Ryan showed that a long, heavy object was used on St. Peter.

The testimony came during the third day of the murder trial in Somerset County Superior Court for Jay Mercier, 57, of industry who is accused of killing St. Peter in July 1980.

The young woman’s body was found  July 5, 1980, off Campground Road in Anson. The trial continues today.