[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/04/08/art.levi.gi.jpg caption=" Johnston appeared on CBS Wednesday, his second national TV interview this week."](CNN) - The war of words between the families of Alaska Gov. Sarah Palin and Levi Johnston doesn't appear to be letting up.
In an interview with CBS, Johnston sharply refuted the Palins' claim he was lying about being permitted to live with onetime fiancé Bristol Palin, and suggested the Palin family is now essentially treating him as an outcast.
"I'm just trying to get my side of the story out there and letting people know who I am," he said in the interview with CBS that aired Wednesday, adding that the biggest misconception about him is "probably that my family is white trash."
In the interview, his second national television sit-down in the last week, Johnston also said his relationship with Bristol Palin began to go deteriorate when Sarah Palin returned to Alaska after the presidential election in Alaska.
"I think when she got back is when it went downhill," he said. "They don't think of me the same way anymore."
Johnston also said he was "heartbroken" when the relationship ended but added "I got an amazing little boy out of it."
Johnston's sister Mercede, also taking part in the interview, was even harsher in her assessment of the Palins, saying they are downright "snobby."
"Look what they are doing," she said. "They are lying trying to save themselves. They are the ones that asked for it. They brought him to the campaign. They should have known what was coming."
In a statement issued earlier this week, Palin family spokesman Meghan Stapleton said Johnston and his family are on a "quest for fame, attention, and fortune."
The Johnstons say they have not been compensated for any of their media appearances.