The plane's flight path, recorded by the website flightradar24.com, would eventually show that it circled downtown Minneapolis, the Mall of America and Southdale Center at low altitude for hours starting at 10:30 p.m., slipping off radar just after 3 a.m.
"I thought, 'Holy crap,'?" said Zimmerman.
Bearing the call sign N361DB, the plane is one of three Cessna 182T Skylanes registered to LCB Leasing of Bristow, Va., according to FAA records. The Virginia secretary of state has no record of an LCB Leasing. Virtually no other information could be learned about the company.
Zimmerman's curiosity might have ended there if it weren't for something he heard from his aviation network recently: A plane registered to NG Research — also located in Bristow — that circled Baltimore for hours after recent violent protests there was in fact an FBI plane that's part of a widespread but little known surveillance program, according to a report by the Washington Post.