A Trenton resident has entered a guilty plea in Livingston County court.  Mathrew Thrun, 28, was charged with endangering the welfare of a child stemming from a 2009 incident.  He is expected to be sentenced at a later date. Another individual involved with the case, Mary Thrun, 31, pleaded guilty in July to two charges of sexual misconduct involving a child under 15. She was sentenced to eight years in the Department of Corrections.