TWIN FALLS, Idaho (AP) — Surveillance video released Friday shows a gunman at an Idaho In-N-Out Burger killing one of three victims last week by firing through a drive-up window. Police in Twin Falls said at a news conference Friday that they still don’t have a motive for the shooting last Saturday. The gunman, Chad Williams, 24, killed himself. Video shows Williams walking up to the drive-thru window four times to fire shots. “What happened here was violent, frightening and deeply traumatic,” Twin Falls Police Chief Matthew Hicks said.