A medical examiner in Michigan says an autopsy has determined that Columbus Blue Jackets goaltender Matiss Kivlenieks died of chest trauma from an errant fireworks mortar blast, and not a fall as authorities previously reported. Police in Novi, Michigan, said the mortar-style firework tilted slightly and started to fire toward people nearby Sunday night. The 24-year-old Kivleniek was in a hot tub and tried to get clear with several other people, police Lieutenant Jason Meier said. The fire department and EMTs got to the private home shortly after 10 p.m. and took him to a hospital, where he was pronounced...