 Before the rally, a new DHS and FBI bulletin said Thomas Crooks bought 50 rounds of ammunition from a gun shop near his home. In the last several months, the bulletin said Crooks received packages marked as containing hazardous materials, and two crude explosive devices were found in the shooter's car and one here at the house. On the day of the rally, sources say Crooks told his father he wanted to go to the shooting range, and that's when his father gave him the AR-style rifle, thinking nothing of it.