filmed by police, attempting to capture any guilty comments made at the boys' memorial. >> the preacher was there, family was there. prayers, crying. emotion you would expect, all appropriate behavior. >> i have silly string. >> her sister brought the silly string. it wasn't darlie's idea. >> this was my son's birthday, devon's birthday, and my sister and her boyfriend went and got silly string. he loved silly string. we did for them what devon didn't get to have and what we knew that he would want and enjoy. they took that, and they twisted it and they turned something that was supposed to be beautiful and tried to make it into something very ugly.