Rochelle Herman wore a wire and recorded conversations she had with former Subway spokesman Jared Fogle about his dark sexual thoughts.
A woman who went undercover for the FBI to gather evidence evidence against Jared Fogle is speaking out.
Rochelle Herman met the former Subway spokesman when he was on a promotional tour for the chain in Sarasota, Florida and he ultimately revealed some of his dark sexual thoughts to her.
Read: Subway's Ex-Spokesman Jared Fogle Agrees to Plead Guilty to Sex with Minor
She told INSIDE EDITION that she couldn't believe what he revealed to her during casual conversation.
"He's a predator, he's a monster," she said. "He told me that the middle school girls were hot. He liked the fact that when they were going through adolescence, how they're physically developed. Those were things that turned him on."
She was totally taken aback by his comments.
She said: "I was stunned. I was in shock and questioning myself, wondering, 'Did I just hear him correctly?'"
Herman, a former reporter for a local radio station, said she went to the FBI and they asked her to go undercover to gather evidence.
Read: Jared the Subway Guy's Home Raided by FBI as Part of Criminal Investigation
For four years, she wore a wire, recording every phone conversation she had with Fogle.
"He wanted to put hidden cameras in my children's rooms and watch them, asking me what child I prefer that he watch?" she said.
"I would always change the subject. He eventually realized that my children were off-limits," she said.
His wife has announced that she's divorcing the millionaire pitchman. Under a plea deal, Fogle could serve five to12 years in prison and pay $1.4 million in restitution to his victims.
Asked if she thought his wife knew what was going on, Herman said, "I don't see how she could not. But I was not in that household. I have no idea about their relationsip."
Asked if she was relieved that this has all come to light, she said" "Knowing who he was and what he was capable of, and what he was doing, it just was something that I wanted to reveal to the public."
Watch Below: Jared Fogle's Divorce Docs: 'Irretrievable Breakdown of the Marriage'
