Any idea how far the 7-11 is from the location where the fight took place? Walking at an unhurried pace a human can cover about 3 miles an hour, so Martin if he were just going home would have needed the 7-11 to be 2+ miles away from that site.
According to Google maps, the distance from the nearest 7-11 (1125 Rinehart Rd, Sanford, FL) to Retreat View Circle (by the most direct route) is about 0.9 miles, but the exact distance depends on where in that development he was headed to.