Scott Rosson

He is the biological son of Rufus Humphrey and Lily Bass, who Lily gave up when he was born. When Rufus and Lily came looking for him 20 years later, his adoptive parents told Lily and Rufus he died in an accident. However he didn't die, the adoptive parents just did not want to lose another son. In the season finale of season 2, Scott left home to go to New York, looking for his birth parents, while his adoptive parents think he's in Portland.