Have O.J. Simpson's Kids Bought Up a Real Estate Empire for Their Dad?

Justin and Sydney Simpson have reportedly paid cash for 13 rental properties in Florida.

Does O.J. Simpson have a secret real estate empire?

Read: Where Are O.J. Simpson's Children Today?

His 28-year-old son, Justin, and 31-year-old daughter, Sydney, both children with his slain wife Nicole, have been reportedly buying up real estate in Florida.

Justin Simpson is a realtor in Florida.

The Simpsons have paid cash for 13 rental properties in St. Petersburg, Fla., since 2015, the New York Post has reported.

Now, the father of Ronald Goldman, who was murdered along with Nicole in June 1994, wants to know if any of the money involved in the real estate transactions came from the disgraced football icon.

If it did, Fred Goldman may be able to claim it as part of the $33 million judgement he won in a wrongful death lawsuit against Simpson.

Goldman family attorney David Cook spoke to Inside Edition about the revelations.

"When people buy property with cash, first thing you say is, ‘What is the source of the cash?’ In this setting, it causes you to start asking questions," Cook said. 

Cook added that if the properties do in fact belong to Simpson, "we would go through and seize these homes and provide for their sale and liquidation and remit the money to Fred." 

The properties range in price from a modest $35,000 for an apartment in one building and $95,000 for a duplex to $215,000 for a four-unit apartment house.

Justin and Sydney were raised by their father after he was acquitted of murdering their mother and Ron Goldman in 1995 in the so-called “Trial of the Century.”

They were not present at his parole hearing, but remain loyal to their dad. Simpson will be released from Nevada's Lovelock Correctional Center in October.

In addition to the real estate news, it has emerged that Sydney’s 28-year-old boyfriend is running for political office.

Read: O.J. Simpson's Forgotten First Wife: Who is Marguerite Whitley?

Robert Blackmon is vying for a seat on the St. Petersburg City Council. He launched his campaign with a fundraiser at a seafood restaurant. He says Sydney is "selflessly supporting me" on the campaign trail.

Simpson will be released about a month before Election Day but won't be eligible to vote.

Watch: 'Hot Felon' Jeremy Meeks Offers O.J. Simpson Advice: 'Stay Out of Trouble'