Republican Florida Sen. Marco Rubio is calling for a federal investigation into reports that Planned Parenthood is providing aborted baby body parts to the University of California San Diego in exchange for “valuable consideration”—while also maintaining intellectual property rights over the fetal tissue.

“If confirmed, this relationship represents a flagrant violation of federal law, which explicitly prohibits the transfer of fetal tissue for any compensation,” Rubio wrote in a letter Tuesday to Attorney General Merrick Garland and Department of Health and Human Services Inspector General Christi Grimm, first obtained by The Daily Signal.

“I request that both of you open an investigation into the matter, publish your findings for the American people to see, and hold any guilty parties accountable to the fullest extent of the law,” he wrote.