Apparently a German Private Investigator has some "explosive" information hidden in a safe of a Swiss bank. (UBS) He has been searching for information on behalf of an unknown party, offering 30.000.000 euro's to solve the mystery.
report in German:
http://www.wifka.de/capital-informant-news.pdf
The Dutch safety board is aware of this info hidden in Switserland, and has asked for the safe to be opened and all paperwork to be handed over, as part of a criminal investigation. See article in a dutch newspaper:
MH17-geheimen uit bankkluis|Binnenland| Telegraaf.nl