2x11 - Blue Murder

Sweet and Castillo investigate the racially motive package bombs that kill Carlotta Alcantara and Martin Simpson, and find themselves dealing with a suspect who ignores Sweet because he's black and is equally dismissive of the Hispanic Castillo. It isn't long before they realise Carl Purdy's motive is connected to his ex-wife's new Cuban husband. Pogue and Oosterhuis investigate the death of political intern Tammy Moore, who was found hanged and dressed in bondage gear by an underpass. Their investigation leads them to the Club de Sade, whose owner sends them right back to the lawyer who had sworn Tammy was too freaky for him.