Law enforcement officials around the country continue to look into R. Kelly’s past in the aftermath of the Surviving R. Kelly docu-series. According to TMZ, the FBI is investigating the controversial singer for arranging a coast-to-coast trip for an underage girl.

Azriel Clary, one of the alleged victims featured in Lifetime’s explosive documentary, was reportedly flown from Phoenix to Orlando in May 2015. Clary was just 17 years old at the time, which has Kelly under scrutiny for possibly violating the Mann Act.

The Mann Act is a federal law against the transportation of a minor for the purposes of prostitution or “sexual activity for which any person can be charged with a criminal offense.”

Sources connected to Clary’s family claim the flight was arranged by a woman who was serving as Kelly’s assistant. Sources in the Kelly camp argue he did nothing wrong because the assistant received a letter of consent from Clary’s mother.

TMZ obtained the letter, which is dated September 2015. Although the flight under investigation took place months before, Kelly’s team reportedly believes it shows Clary’s family was willing to let her travel.

Since the original report was published, Kelly’s attorney Steve Greenberg has denied any violation of the Mann Act and claimed the story was “flawed.”

“Mr. Kelly has not violated the law,” Greenberg said. “Certainly not the Mann Act. The story has flawed factual predicates. Beyond that, we remain unaware of any investigation, anywhere.”