Police said they found evidence on Facebook in a case of sex and blackmail involving a bus driver and two high school students.

“I have been in law enforcement since 1995 and I've investigated numerous sex offenses. This is the first time I have ever had the alleged victims try to extort the alleged suspect, ever,” said Sgt. Josh Hamlin with the Gaston County Police Department.

Police said bus driver Kwanda Carpenter dropped off the 17-year-old boys at Bessemer City High School every day.

But they said one night last October she picked them up in her personal car.

“Went to a dead end street and sexual contact occurred,” Hamlin said.

Then, police said, the teens started sending her messages.

“They sent her Facebook messages requesting $60 in cash in exchange for not reporting her to police,” Hamlin said.

According to arrest warrants, the teens threatened to tell police their bus driver raped them.

Eyewitness News went to Carpenter's house Thursday. She and her mother insist the students are lying.

She said she told police the same thing, but police said they found evidence that sex actually occurred.

They said they also found evidence of blackmail. So they charged the bus driver and both teens.