There is an FR thread overnight linking to a post that made the connection to him or between him and Volant. Plus some discrepancies. An interesting consideration, maybe he has history with intelligence groups? Overall, so little shared about what his history is, his work, his travels, etc. Something incredibly missing to have this otherwise unremarkable 64 year old white guy going through such meticulous planning, maybe even an earlier attempt in September, to then carry out a so-far unattributed terrorist attack. I tend to believe he has connection with Islamic terrorists but with only their claim, that is still speculation.
My biggest fear is we will never know the truth.