A Virginia court found that Virginia Tech killer Seung-Hui Cho was "mentally ill" and dangerous. Then it let him go. Back in 2005, the District Court in Christiansburg said that Cho was a danger to himself but not others. He was ordered to undergo outpatient care. The ruling came after Cho was taken to a nearby psychiatric hospital for evaluation in December 2005, after two female schoolmates said they received threatening messages from him and police and school officials became concerned that he might be suicidal. That information came to light two days after Cho, a Virginia Tech senior, killed...