Did Antonio kill a person, cover it up, had another Intelligence member take the fall and get killed in jail to save his son? No he didn't do that. Antonio isn't obligated to agree with everything Voight does just because of his son. The Unit is already on a short leash when Erin took a gun and threatened a suspect and now with Voight having killed somebody, why should Antonio be a lap dog for Voight cause his and the team's job is also on the line.