From Dusk till dawn Easter Egg - T-Shirt Homage

You'll notice throughout the whole movie that Jacob's son Scott is wearing a t-shirt with the phrase "Precinct 13" on it. This is actually a reference to the film "Assault On Precinct 13", which was one of John Carpenter's first movies. Tarantino must have put that in the movie as an homage to both Carpenter and the film.