A medical examiner in Michigan said 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 Kivlenieks was in a hot tub and tried to get clear with several other people, Lt. Jason Meier said. The initial autopsy determined Kivlenieks died from a percussive injury caused by the powerful blast from the fireworks, which triggered major damage to his heart and lungs, according to police. “There was some minor injury to his exterior, which would lead us to believe that some portion of the firework made contact with him, but we’re not really sure if it was a direct hit or whether the percussion from the explosion caused his injuries,” Meier said, according to The Detroit News. Meier said the fire department and EMTs arrived at a private home at 10:13 p.m. local time on Sunday. Prior to the autopsy, police said Kivlenieks was believed to have slipped and hit his head on concrete while running from a malfunctioning firework. Kivlenieks started in two games for the Blue Jackets this past season and had recently played for Latvia at the IIHF World Championships. He played in eight total games in his NHL career and was expected to compete for more playing time next season.