Erie County coroner Lyell Cook on Monday named Matthew Stone Sr., 45, as the gunman who killed eight people in Erie, Pennsylvania. Seven were his relatives, including two young grandchildren. The city's police chief, Rick Lorah, said on Saturday he thinks 'mental health is at play here' but called it too soon to discuss motive.
Among the dead was Stone's daughter Angelina, who was eight months pregnant. He took his own life after Friday's Erie mass shooting. Lorah has not said what prompted his remark, which came before any finding on motive. Researchers say few violent acts trace back to mental illness.
