the Sheriff 's Office bought a doughnut , energy bars at a gas station at early that morning , source says . He visited 6 Walgreens and Walgreens twice in the hours before the shooting , police say . The shooting suspect was in and out of his hotel room repeatedly the hours . A teenager walking his dog spotted the bag Thursday in a dry riverbed near Loughner 's family home , officials said . Police say it will take 10 days to get DNA test results on a black bag related to the probe .
the Sheriff 's Office bought a doughnut , energy bars at a gas station at early that morning , source says . He visited 6 Walgreens and Walgreens twice in the hours before the shooting , police say . The shooting suspect was in and out of his hotel room repeatedly the hours . Police say it will take 10 days to get DNA test results on a black bag related to the probe .