Dorian is claiming he never heard about Bitcoin until a few weeks ago so if he was using them in 2011, then he is obviously Satoshi
Here, I'll give you an alternative explanation: Dorian was an early bitcoin adopter or otherwise had a small number. When reporters started asking his son if he was Satoshi, he realized that that would damage his reclusive lifestyle if people thought he were Satoshi. He thought that telling the truth, that he knew about bitcoin but wasn't Satoshi, wouldn't be believed so he told a lie to preserve his reclusive lifestyle.
But anyway, this eye witness seems a bit odd for other reasons.