SEDALIA, Mo. (AP) — Police are focusing on the hometown of a man being sought in the deaths of his ex-girlfriend and her son, weeks after he was charged with restricting the woman to a crate in their western Missouri home.

Sandra Kay Sutton and her 17-year-old son, Zachary Wade Sutton, were found dead Thursday in a relative’s home in Clinton. Both appear to have been shot.

Authorities have been searching for James Barton Horn Jr. since he was charged with kidnapping Sandra Sutton three weeks ago. Investigators allege he kept her in a wooden box off-and-on for four months at their home in Sedalia, about 45 miles from Clinton.

Clinton police Lt. Sonny Lynch says authorities believe Horn may still be in the Sedalia area and that someone may be helping him.