> Then Ulbricht walked into the public library and sat down at the table directly in front of me, and suddenly as I was reading I could look up and see exactly the chair he had been in, where the plainclothes police had positioned themselves, how they had arranged a distraction.
Alternately:
> Ulbricht had walked into the public library
gives the game away.
If you still want to play around a bit:
> I could see where Ulbricht walked into the public library. The table he sat at. I looked up and saw where the plainclothes police had positioned themselves, how they had arranged a distraction.
That way you are leaving some ambiguity, but are not directly lying with the tenses.
To go into the meat of this: he is imagining it while reading in the same location as the incident happened. This is a style of writing. It's definitely not wrong.
I was willing to give you the benefit of the doubt, somebody who aspires to be a better writer. But, no, this clarifies that you're just pretentious.
Many of us can't. Personally, for nearly three decades I thought the ability to vividly experience a book this way was just some overused and extremely exaggerated metaphor - and then I discovered aphantasia is a thing, and I score close to top of its severity scale.
So perhaps it's less about your starting point, and more about describing a frame of mind some in the audience don't have, and can't relate to.
Curiously, I don't recall ever seeing this particular style of writing before, in any of the books I ever read.
How many languages do you speak? A large part of this site speaks at least two, and usually English is not the first one of them.