Revealing mistake: In one of the shots of a newspaper you see a serious grammatical error for a headline. The use of "it's" instead of "its". It was something to the effect of "Ahead of it's Time". Forgivable for a note left by a character, but a mistake that real newspapers just don't make. Just FYI: The actual headline is "Nexim Announces It's Answer to ARC's Living Display". (00:11:40)
Revealing mistake: During the close-up of the gas canisters, the condensation is running upwards and "into" the valve. (01:31:10)
Answer: He could have got someone to obtain the key and bring it to him. The same goes for much of the other stuff in the envelope.
Xofer