The former police employee used federal and state to look up information on 11 individuals with whom she had "personal, familial, or professional connections" more than 250 times.
The Missouri Real Estate Commission said the developers, who previously faced separate criminal charges, had been evasive throughout its case and ignored a judge's order to produce evidence.
The order directs leaders to launch disciplinary proceedings, and possible criminal referrals, for "personal use, stalking, or unauthorized sharing" of license plate data.
Siddharth Jawahar, 38, will serve 11 years in prison for defrauding investors of about $36 million, much which he was also ordered to pay in restitution.