(December 28, 2017, 4:29 PM EST) -- MIAMI — A California man bilked more than 8,400 investors nationwide of more than $1.22 billion through a series of unregistered securities offerings as part of a massive Ponzi scheme, the Securities and Exchange Commission alleges in a complaint filed Dec. 20 in Florida federal court (Securities and Exchange Commission v. Robert H. Shapiro, et al., No. 17-24624, S.D. Fla.)....