AMHERST - Investigators have determined the Friday morning death of a 20-year-old University of Massachusetts student was a suicide. Liam O'Donnelly of Hingham died of multiple trauma, Terrel W. Harris, communications director for the state Executive Office of Public Safety and Security, said of the autopsy finding. UMass Amherst Police responded to a report of someone jumping from the 17th floor of the John Quincy Adams residence hall around 3:30 a.m. that day O'Donnelly was a sophomore studying resource economics at UMass. Campus spokesman Edward F. Blaguszewski said O'Donnelly lived in a single-person room. The case was investigated by campus...