Police are investigating an assault inside a Raleigh convenience store that left a man dead. Javan Cannon, 51, was seriously injured in the assault, which took place at the MH New Mart on Garner Road just after 11 p.m. on Saturday night. He later died as a result of his injuries. Detectives are investigating the incident as a homicide. Anyone with information that might assist the investigation is asked to contact Crimestoppers at (919) 834-HELP.