Keelan Harris pleaded guilty in August to a dozen charges including wire fraud, conspiracy and money laundering.

Harris and Karen Starr were indicted last year in connection with a "Ponzi" operation at Complete Developments LLC and Investments International.

According to the FBI, “Ponzi” schemes promise high financial returns or dividends not available through traditional investments. Instead of investing the funds of victims, however, the con artist pays “dividends” to initial investors using the funds of subsequent investors. The scheme generally falls apart when the operator flees with all of the proceeds or when a sufficient number of new investors cannot be found to allow the continued payment of “dividends.”

This type of fraud is named after its creator—Charles Ponzi of Boston, Massachusetts. In the early 1900s, Ponzi launched a scheme that guaranteed investors a 50 percent return on their investment in postal coupons. Although he was able to pay his initial backers, the scheme dissolved when he was unable to pay later investors.

According to authorities, Harris, Starr and Kevin Harris conspired to defraud more than 100 investors out of more than $15.8 million from 2006 to 2009.

A Federal Judge sitting in Cleveland also ordered Keelan Harris to make restitution in the amount of $15,596,345.

Federal investigators say the three promised investors a 7 to 12 percent return on their investments that never came to fruition.

Kevin Harris has already been convicted for his part in the scheme. He was also ordered to make restitution and is serving five years in prison.

The case against Karen Starr is still pending