The preliminary report states:
"the flight data and cockit voice recorders revealed the following"
Then 7 facts are listed. Number 2 says:
"minutes before the crash the F/O (first officer) left the cockpit for the lavatory and only the captain remained in the flight Deck. "
All the points in the report are shown at avherald.com
Crash: LAM E190 over Botswana/Namibia on Nov 29th 2013, captain intentionally crashed aircraft