Of course

BERLIN (Reuters) – Saudi Arabia has offered to help German investigators find those behind Islamist bomb and ax attacks in July, news magazine Der Spiegel reported on Saturday, citing a senior member of the Saudi government.
Saudi authorities are in contact with their German colleagues, responding to new findings that show both attackers were in close contact via a chat conversation with possible Islamic State backers from Saudi Arabia, Spiegel said.

http://www.breitbart.com/london/2016/08/08/germany-investigates-saudi-arabia-linked-islamic-state-backer-recent-axe-bomb-attacks/

They were all obsequious after 911 also. When the investigation gets too close, the Sauds will simply say there is no evidence. They are puppet masters.