He is of Lebanese ancestry and studied in Lebanon for 2 years thus he likely speaks Arabic and has Arabic speaking friends. This alone could be enough if someon

He is of Lebanese ancestry and studied in Lebanon for 2 years thus he likely speaks Arabic and has Arabic speaking friends. This alone could be enough if someone among his acquaintances has terrorist links. In addition he was one of the first to speak out about Bradley Manning's arrest, in his support, which raises the possibility that he has connections with WikiLeaks, lulzsec, etc. That is enough for CSIS to investigate him. He also has traveled to the USA which is where the FBI gets involved and, of course, anything regarding terrorist connections or lulzsec brings in the CIA. Quite frankly he is not a clean person and should not be developing software like this. If you were a business executive with shady dealings, would you want to use software from this guy? Would you trust him not to install a backdoor? And would you take the risk of travelling across an international border with a copy of this software knowing that 3-letter agencies associate it with terrorism?