Barrios chaired the Committee on Public Safety and Homeland Security. He authored legislation creating a state witness protection program and establishing an anti-gang violence grant program known as the Shannon Grant. He also authored one of the nation's most comprehensive identity theft laws, which provided new protections to consumers whose personal data is stolen from retailers or other third parties. Barrios wrote a law updating state fire codes in the wake of a deadly night club fire in neighboring Rhode Island. He also authored an "anti-bullying" bill, which only passed the state Senate, directing schools to respond more aggressively to student reports of violence and "cyber bullying."