SEATTLE (AP) — The gunman had already shot a police officer, threatened to kill two children and barricaded himself upstairs in a house for 11 hours when one of the kids, a 6-year-old boy, escaped. "Once we were able to assess that the kids were still alive, it went into play," Troyer said of the SWAT team's plan to end the standoff in a suburban neighborhood south of Seattle. The standoff began after Police Officer Reginald "Jake" Gutierrez, 45, was fatally shot Wednesday night when he and his partner went into the house to investigate a domestic violence call. Several adults and the two children had been in the home earlier in the day, but it was not initially clear whether everyone had escaped when the shooting started, Tacoma police spokeswoman Loretta Cool said. Johnson had threatened to kill the children, and officers heard screaming and gunshots during the standoff, but once the officers determined the children were still alive, they executed a plan to get them out.