Liberty City Police Department
The Liberty City Police Department is the police department for Liberty City, which has bases on Portland Island, Staunton Island and Shoreside Vale. There are three known police officers in the LCPD: Police Chief Jim Ramirez, Leon McAffrey and Ray Machowski.
The LCPD keeps track on the criminal elements in Liberty City, and focus primarily on the mafia families (the Leone family, Forelli family and Sindacco family). In 1998 they are tracking Vincenzo Cilli, Toni Cipriani and Salvatore Leone. In 2001 they continue to track Toni and Salvatore, but also concentrate on Joey Leone and Luigi Goterelli, along with investigating the gang problems in the city. The LCPD appears to be under funded by Mayor Miles O'Donovan, as they only receive helicopters in April 2001. 
Leon McAffrey is a corrupt police officer, who is involved in selling stories to the Liberty Tree newspaper and in helping various gangs. The first can be seen on the Liberty City Stories website , whereas the second can be seen during Liberty City Stories (as he helps the Leone family and the Uptown Yardies). An investigation is launched into corruption within the LCPD, and McAffrey is place under arrest. He later turns evidence to the state about fellow corrupt officer Ray Machowski, which leads to his death in Plaster Blaster in Grand Theft Auto III.
Ray Machowski is another corrupt police officer, who was straight but later became a corrupt officer. He begins to work witht he Yakuza, but in 2001 he has been ratted out by Leon McAffrey. He employs Claude to kill McAffrey and then assist him in his escape from the city.