Shawn then appears again with his gang and he notices Robby watching the TV on the fundraising for Miguel's surgery and Samantha presenting in it. Shawn then tells Robby 'What you looking at, newbie'. He tells the cellmate to move from a table he was sitting at and when the cellmate ignores him, he gets tempered and smacks the cellmate's head on the table in Now You're Gonna Pay, causing him to bleed and Robby checks if the cellmate is ok. Shawn first appears and taunts a cellmate about the cellmates mother sending him empanadas, a Spanish food and taunts him about the word 'Empanadas' overall. The reason he was sentenced to Juvenile Detention at SJDC was for defending his little brother from being attacked by a former friend of his that was stealing money from his family, it is possible that Juvenile Detention made him a bully. He likely was a street fighter for most of his life.

He has a younger brother named Kenny who is very different from him. Shawn was born to a US Army Soldier and an unnamed mother.