Federal investigators have opened a second criminal probe of U.S. Rep. David Rivera, examining undisclosed payments from a Miami gambling enterprise to a company tied to the Republican congressman, The Miami Herald has learned.

Agents with the FBI and the Internal Revenue Service have begun interviewing witnesses knowledgeable about a $1 million consulting contract between Flagler Dog Track — now known as Magic City Casino — and Millennium Marketing, a company co-owned by Rivera’s 70-year-old mother and her business partner, according to sources familiar with the investigation.

In the next few weeks, federal agents are scheduled to interview Lori Weems, a lobbyist and lawyer who drafted the consulting contract while representing the Magic City Casino, sources said. Earlier this year, FBI agents also interviewed Esther Nuhfer, a Miami lobbyist and political consultant with close ties to Rivera, sources said.

Full story here.

In a statement, Rivera's campaign said: "The Miami Herald story is a recycling of the same old, false, misleading, unattributed, and unsubstantiated reporting that has characterized their coverage thus far."