More Questions About V.T. Shooter

Police have released more information that the Virginia Tech shooter Cho Seung-hui may have conducted a dry run of his shooting rampage just two days before the shootings.  Additionally the police still have not been able to link why Cho shot certain victims as well as why he shot students in the building that he did. 

The strangest thing is that Cho hid hard drives from multiple computers that he owned.  The police have been unable to find where Cho had the hard drives.  If those hard drives could be found I bet a lot of questions about why Cho did what he did could be answered.