recorder was located after the plane crashed last month. a european official says the actions of the co-pilot amount to premeditated murder. andreas lubitz is accused of deliberately crashing the plane, killing everyone on board. here's cnn's will ripley. >> reporter: a stunning new revelation in the germanwings' investigation. prosecutors say a tablet seized from andreas lubitz's apartment reveals a series of chilling internet searching in the week leading up to flight 9525, including the day before the crash. >> translator: according to these search terms, the user searched for medical treatment and thought information on methods to commit suicide and searched with terms relating to cockpit doors and security measures. >> reporter: a european government official with detailed knowledge of the investigation tells cnn all evidence points to the premeditated murder of 149