To maintain the jailhouse and make sure criminals behave. Ability to use three important items (Taser, Baton, & Handcuffs) to discipline escaped criminals and keep or send them to their cells if they escape.
To find a way to escape your cell and make way to the exit for your freedom. Ability to use a fork to pick locks on doors (lock or unlock). Push over objects to block off doorways to distract and slow Officers down. Work with your fellow Criminals to devise a plan for an easy escape.
(A little side note. The game is and will be balanced. So don't think just because Officers can use the said items that they will be overpowered. That is NOT the case. Strategy! Teamwork! Stealth!)