the other officers had already marked several showcasing's in the meadow. and abruptly, chad story changed. >> i had spent many hours with him that night, questioning him, asking him if any other firearms and venues. demi continually said no. then at the very end of the interview, and the, drive that he finally did tell us that there is another gun used. >> that's when he saw on the ground as they all, did 2 to 3 caliber casings, the kind they would come from an ar-15 assault rifle. which chad finally admitted that he used, here in the metro. >> and prior to that, had you shot that and any other time? >> some, not that i recall. no. >> okay. >> but then, his story changed again, he admitted he fired the ar-15, just before he got to the metal. . >> how about behind? us when you shouted them coming off the dirt road.