the field as if they were looking for something. they were. they were. reporter: and imagine what they found there in a ditch along the highway. probably the most important thing was they found loaded magazines. they had the same type of ammo that was found at the crime scene. and the shell casings found at the crime scene matched that type of ammunition found in the ditch at highway 141. reporter: right there in the ditch near where the car crashed? it was actually across the highway and a little bit farther down, but within 500 yards of where the crash occurred. they also located in that ditch some paper targets that you would use for shooting target practice. some shooter s ear muffs, a camo neck cloth that you d wear you could wear as a mask. reporter: like somebody preparing for an act of terror