The 54-year-old man was crossing from the store to the parking lot when he was struck by a truck driven by a 17-year-old.
Since its creation in 1967, the agency reports it has investigated more than 153,000 aviation accidents and incidents.
Air crash investigations can take months, and federal investigators told reporters they would not speculate on the cause.
According to the FAA, an Army Black Hawk helicopter collided into a 60-passenger flight landing at DCA midair.
The property, at 125 Rooney Circle, boasts a rustic main residence with 16,631 square feet with seven bedrooms and eight bathrooms.
The Baltimore Banner newspaper said it spoke to six massage therapists who recounted firsthand experiences with Tucker from ...