A bizarre case of what appeared to be justifiable homicide rattled the heart of Seattle's swanky downtown shopping district late Saturday morning. Seattle police are still piecing together what happened, but this much is known: A young man was killed on the crowded sidewalk outside Westlake Center, and the confessed shooter was allowed to walk out of a police station. The case, according to police and witnesses, began at 11 a.m. Saturday with a 911 call.