Struggling actor Seth Mazzaglia has charged with the murder of University of New Hampshire student Elizabeth Marriott, affectionately known as Lizzi, who went missing for days. Police say she is dead, but haven’t recovered her body yet. Elizabeth Marriott was a marine biology student, who lived with her aunt in Chester. She graduated from Westborough High School in Massachusetts. It is not clear how Marriott knew Seth Mazzaglia, 29.