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.
Having this tableau unexpectedly unfold right in front of my eyes was a fascinating experience, and it certainly made the article suddenly get a lot more immersive!
[1] https://www.wired.com/2015/05/silk-road-2/
EDIT: to be clear, I was not present for the arrest. I was reading the magazine, some years after the arrest, but in the same place as the arrest. (I didn’t qualify the events with “I read that...” since I thought the narrative ellipsis would be obvious from context; evidently not.)
You mean "when I read the part where the FBI agents stopped to have a drink I thought"?
This part makes your comment super confusing. Where you there then or later?
> 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.