Kim Yang-soon, Cho's great Aunt has stated that Cho was diagnosed with autism as a child after he arrived in the US.
Now it all makes sense. Those autistics, there's something wrong with them. Now we see that they have the potential to be dangerous psychotic killers.
What we need is a law to require the permanent institutionalization of anyone diagnosed autistic.
It's the only way to be sure to be safe and prevent these rampages by psychautistics in the future.