The John Roberts on the flight log is not SCOTUS. People have tracked down who it was. That list was a list of the pilot not the plane
The plane for John Roberts was eventually sold and then went down in a drug excursion.
CIA often sells planes to hide ownership. Not saying this has anything to do with CIA.
"Gulfstream II jet was observed illegally entering Guatemalan airspace. The aircraft landed on a strip close to the Mexican border. Cargo was offloaded and armed men set the aircraft on fire before the Guatemalan Army arrived. The aircraft was presumed to have been carrying narcotics."
https://asn.flightsafety.org/wikibase/319308
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