Head of the Secret Service Protective Intelligence Division and Garrison's estranged former protégé. He oversees the polygraph investigation, initially suspects Garrison of treason due to a past marital rift, but eventually teams up with him in Toronto to stop the assassination plot and reconcile.
Past mentorship relationship that has soured over time.
Breckinridge leads the division where Marin works as his rookie partner.
Professional peers managing different aspects of presidential security.
Ballentine trusts Breckinridge with sensitive information to clear Garrison.
Professional peers within the same agency.
Explore the full interactive character relationship map of The Sentinel