Authorities say a business owner arrived at work to find the legs of dead man dangling from an oven vent in the building's kitchen. The Jefferson Parish Sheriff's Office says the discovery was made Saturday morning by the owner of Greg's Food Mart in Marrero. The dead man had apparently tried to gain access to the business through the vent opening in the roof in an apparent burglary attempt. His identity was not available Saturday evening. An autopsy was planned to determine the cause of death.