Police

Police are units of civilian law enforcement. They can be a friendly or hostile faction, based on each mission.

Zakhaev Airport Security
The first police faction to appear in the Call of Duty series. They were the first responders to the attack on Zakhaev Airport. They desperately tried to stop the massacre, but were quickly gunned down. Failing in putting a stop to the massacre, they called in the FSB.

FSB
Called in to stop Makarov's terrorist unit. This attempt failed, despite being well-armed.

Virginia PD
While not seen directly, their wrecked police cars litter the streets of Virgina. It is possible that they fought back against the Russians but were defeated.

Havana Police Department
Called in after several Tropas members were killed by an undercover SOG unit and quickly arrived on scene but are killed by Mason's SOG unit and Carlos's Cuban rebels. They're seen in the mission "Operation 40".

US Military Police
They escort Alex Mason, Jason Hudson, Robert McNamara, and an Unknown General to the Pentagon for Mason's meeting with John F. Kennedy. They are also zombies in the map Five.

New York Police Department (NYPD)
New York Police Department cruisers are also present throughout New York City in the mission Black Tuesday.

Metropolitan Police Service
The territorial police force responsible for Greater London. Seen at the end of "Mind The Gap".

Zakhaev Airport Security
The first responders to Vladimir Makarov's terrorist attacks. They appear in "Blood Brothers", in the flashback to the Call of Duty: Modern Warfare 2 mission "No Russian".

New Jersey Police Department
The NJPD are seen in the map Interchange but their cars are reused NYPD cars.

Los Angeles Police Department
The LAPD are seen escorting Harper, David Mason, Jones, Samuels, Johnson, and the U.S. President in the beginning of "Cordis Die". They are also the only police force to have African American members.

Federal Bureau of Investigation
The FBI also assist in protecting the President in "Cordis Die", and are a playable faction in multiplayer.

Alcatraz Guards
The Alcatraz Guards are a playable faction in the Grief mode of Mob of the Dead, facing off against the Alcatraz Prisoners at the prison of Alcatraz in San Francisco. They also appear as zombies.

San Francisco Police Departement
San Francisco Police Department officers are seen in the Story Reveal trailer. They help the player defeat the Atlas forces in the mission Collapse.