An ex-cop who advises Brown that he may have been set up to distract from the Rampart scandal. He provides tips on a high-stakes card game, but their relationship sours when Brown accuses him of betrayal, leading to Hartshorn suffering a fatal heart attack.
A retired officer guiding Brown through street tactics and institutional dangers.
Their actions indirectly place them in opposition to Timkins' investigation.
Explore the full interactive character relationship map of Rampart