After revealing that Lin was a traitor to Donnie, Sharp ultimately shot The Protagonist and Lin, locked them in a trunk, and pushed the car into the river northwest of the Ultor Dome, resulting in Lin's death.
The Ultor Dome was also the site of the only instance of Demolition Derby in the game.
It is also the site of the final Brotherhood mission, Showdown, despite being considered Sons of Samedi territory.
Demolition Derby was now at the Culex Stadium, but a Fight Club was now going on here near the locker rooms of the Ultor Dome.
Banners on the dome and the nearby Sports Bar seem to indicate that the Dome is where the Stilwater Sharks play their games, but it must be the off season during the game as the Dome interior is currently set up for some sort of vehicular activity, as evident during the Maero encounter.