Grand Theft Auto: Vice City

In order to use a Police Bribe, you need to collect a police badge icon when you have at least a one star wanted level. These icons are found in numerous locations throughout the game, similarly to that of health icons.

The following video shows the location of the easiest one to find very early in the game. All you need to is get a wanted level e.g. stealing a car in front of a policeman or crashing into a cop car etc. Once you have at least a one star wanted level head to the location on the map and drive or walk, through the icon to lose your wanted level and unlock the trophy.