Not a secret but ignored by the (((authors))) of mainstream history.
Part time planefag here. Checking tail numbers of small planes that flew over the area at flightradar. Got N763CA just before 2PM local time when the crash happened according to local reports
https://losangeles.cbslocal.com/2019/02/03/firefighters-respond-to-report-of-plane-down-in-yorba-linda/
Who sold it to them?
Nobody cares, sports are for boomer faggots