talk as much. she was quiet. >> reporter: with no idea why her sister and mother were shot, ebony and her grandparents remained fearful. you must have been worried like, who did this and where are they? >> yeah, i was thinking about the safety of the other kids and me. i didn't go out much. >> reporter: back at the police station, detective arnold was trying to find out his next move when he got a break. a 75-year-old spotted some of erin's things in a ditch three miles from erin's house and phoned police. there were empty prescription pill bottles, credit cards and id cards and personal papers and something else that did not belong. >> what is this thing? >> a cadillac manual. >> a cadillac owner's manual. it stood out because it didn't fit with the rest of the mess. why was the car manual there and whose was it? rick arnold tried thumbing