State residence is just a social construct.
Aerospace researcher - said to have been "a ballistics genius inventing a process for long range artillary and even the orbiting of payloads via artillary guns." He was assassinated in 1990 a day or two after returning from Iraq.
Speculation was that he was assassinated by "either the Iranians, the Israeli Mossad, the British M-I6, or the CIA. (I'm glad I know nothing about aerospace ballistics)
Part of the FBI document tries to determine if Bull had knowledge of Iraqi chemical, nuclear, or biological weaponry. Events surrounding his assasination (items seized before and after) are suspected of relating to a "super canon" he had developed. Seizure of nuclear triggering devices meant for iraq, long metal tubes seized in Britain thought to be cannon barrel(s). At least one of the documetns in the PDF was directed to William Sessions, Director of the FBI under Bill Clinton.
I am skimming the document now and will have to read through more carefully later.
https://vault.fbi.gov/gerald-bull/gerald-bull-part-01-of-01/view
And here's a Wikipedia entry on Gerald Bull.
https://en.wikipedia.org/wiki/Gerald_Bull
>>State residence is just a social construct.
More like financial. I lived in two states for ten years, commuting weekly. Always hated paying taxes in both.