They met on Facebook when she was 14 or 15 and he soon talked her into sending him sexually explicit videos of herself.
Three years later, authorities say, the South Florida teen was the victim of a "sextortion" attempt when her former online "friend" threatened to make the videos public if she didn't have sex with him.
On Friday, Jesus Javier Hernandez Carvajal, 25, appeared in court on federal charges of transporting and possessing child pornography and making extortionate threats.
Soon after the South Florida teen sent him the videos in 2012, investigators said, Hernandez demanded she meet him and have sex.