LEWISTON -- A 23-year-old man has been charged with the rape of an underage girl in northern Idaho. His mother also faces a felony after authorities say she intimidated a witness in the case.

Patrick Graber has been charged with felony counts of statutory rape and lewd and lascivious conduct.

His mother, 46-year-old Theresa Graber, has been charged with a felony count of witness intimidation in connection with the charges against her son.

Clearwater County Prosecutor Clayne Tyler says the investigation is ongoing and dates back to 2004 in Orofino, Idaho.

Both Grabers are scheduled to appear in court on Aug. 29.

Patrick Graber is the father of a 15-month-old boy who died last summer after another relative left the child in a locked car and temperatures approached 100 degrees.