McCarthy, while posted as legal advisor to the Commandant of Midshipmen, was involved in the arrest and eventual conviction of Diane Zamora for murdering Adrianne Jones.[when?]

[7][8] He was interviewed on the program, "Fresh Air": Guantanamo has been [incorrectly] painted as a place where detainees are sent and are held incognito, where they lack access to courts, their family members and the media.

Captain McCarthy went on to state "Fifteen-year-olds, in my opinion, should not be held to the same level of accountability as adults", arguing that Omar Khadr has the potential to be rehabilitated.

[4] Retired from the Navy, McCarthy is currently the leader of PwC's Global Intelligence Operations Center as a senior Director in the Strategic Threat and International Anti-corruption & Program Integrity Practice Groups.

In this role, he advises clients globally in both the public and private sectors on myriad operational, ethical, regulatory and crisis related challenges.