Last month, Subway spokesperson Jared Fogle's home was raided by federal authorities in connection with a child porn investigation.
It was initially thought that the FBI was merely following up on an earlier investigation involving a former employee of Fogle's charitable organization, and that Fogle himself was not under suspicion.
As the weeks went by, however, sources came forward with stories of highly inappropriate conversations they'd had with the 37-year-old pitchman, including a reporter who claims Fogle told her "middle school girls are hot."
Now, the FBI has subpoenaed an affidavit containing text messages between Fogle and a female former Subway franchisee in which Fogle allegedly admitted to paying a 16-year-old girl to have sex with him.
Sources familiar with the content of the messages say Fogle also encouraged the woman to offer sexual services on Craigslist in exchange for money.
The recipient of the texts - who has asked to remain anonymous - says that she contacted Subway's corporate office with a complaint about Fogle's comments shortly after their conversation in 2008, but the fast food giant dismissed her concerns.
Insiders say that the woman admitted she was in a sexual relationship with Fogle at the time that the messages were sent.
Subway suspended its relationship with Fogle on July 7, after allegations of his sexual misconduct came to light.
It is unclear at this time if Fogle will face any criminal charges.