Update: June 19
Emily Bazelon has an article in Slate discussing whether Ravi should have testified, and mentions three computer Word document files and a written note from Clementi that were not introduced into the trial or made public, because Ravi was not charged in the death. Ravi was released today from jail after 20 days, for work and good behavior.
The private files could shed light on Clementi's mindset, and might suggest that he had issues even before the spying incident. The Slate story is here.