In season four, episode 13 of MTV's "Catfish," Nev Schulman and Max Joseph helped 19-year-old Falesha Sapko find out who her copy catfish is and helped stop the cyber bully from stealing her identity.

Sapko, a Pittsburg, Pa. native, dealt with what Schulman and Joseph call a "copy catfish," someone who tries to assume someone else's identity by stealing their photos and posing as that person on social media.

Sapko's copy catfish took her photos and used them on a Facebook profile for a girl named "Jacqueline Linkwood." The catfish then changed the name on the "Linkwood" profile to Sapko's and assumed her identity on Facebook. The fake Sapko added classmates from her high school and started cyber-bullying Sapko's friends. The fake profile's rude comments ruined Sapko's reputation at school.

Schulman and Joseph went to work to figure out the cyber-bullying catfish's real identity, and traced "Linkwood" back to another teen from Maryland named Tracey Armah. Schulman called Armah and asked if she would be open to meeting the real Sapko. She openly admitted to being Jacqueline Linkwood on Facebook and stealing Sapko's identity for her online personality.

"It's fun being Jacqueline," Armah told Schulman, "I'm a different person when I'm her."

During the meeting between Armah and Sapko, Armah giggled and smiled and refused to take the blame for the pain her actions caused Sapko and the people she cyber-bullied.

"I'm proud," Armah said. "When I got to bully people, I felt tough."

"What if someone she cyber-bullied killed themselves because of the things she said to them," Joseph asked Armah, and she laughed.

"I wouldn't cry, would you want me to cry?" Armah asked, smiling. "It's not my fault they killed themselves."

It was clear that Schulman, Joseph and Sapko didn't getting through to Armah, so they went back the next day to try to make her understand the severity of her cyber-bullying. They eventually broke through and Armah admitted she wanted to change her ways.

"I am a good person, I am," she said before cameras left. "I would like some help, but I'm scared."

See a clip from last night's episode below.