The best way to protect the house from burglars is to install burglar alarms, which will automatically summon the police when they go off. If Sims have to call them manually, they probably won't arrive in time.
In The Sims, there is one police officer named Michelle the Policewoman. If summoned when there is a burglar, she will arrest the burglar, and he will go peacefully. The family will be reimbursed for what was stolen, and will receive a §1000 reward. Michelle does not drive a squad car, and will always arrive and leave the lot on foot.
In The Sims: Livin' Large, if a Sim uses the "Concoctanation Station" chemistry set outdoors during school hours, Potion Enforcement Agent Angie, a police officer, will come and fine the Sim §500 because of the smell. Oddly, this will also happen if a Sim drinks a potion during those hours, even if it was made outside of school hours. If a Sim with low logic skill uses the set, there is a chance that a failed potion with a bad smell will be created, in which case the police will come and fine the Sim for the smell.
Prior to The Sims: House Party, Sims who have a party with a large quantity of guests at night will receive a visit from the police, who will warn them about the noise and ask them to dissolve the party. If Sims do not send all the guests home, the officer will reappear after a period of time and fine the Sims.
Calling in a false alarm to the police station results in a stern warning, although no fines or any other consequences will be issued.
If the policewoman arrives on the current lot due to a burglar, she will be seen holding a baton. Once the burglar is spotted, the officer will blow her whistle and the burglar stops where he is at, with his hands raised.
The Sims 2
In The Sims 2, the police will arrive almost immediately after they are summoned. Unlike The Sims, the police will need to fight the burglar in an attempt to make an arrest. If the police officer wins, the family will be reimbursed for any stolen items, and will receive a §500 reward for the capture of the robber. If the officer loses, the robber will escape with whatever he or she managed to steal. If the police officer and the burglar cannot get into a position to fight, the burglar will flee, and the police officer will say "Next time, burglar! Next time you're going down!" before leaving.
If a Sim calls in a false alarm, the police will fine them §200-§500. If the family doesn't have enough money, the police will take away one piece of furniture. If the family doesn't have enough money or any items that aren't in use, the police will say they are fining them, but nothing will happen and they will just leave.
Sims can also call the police to report a runaway teen. If the teen is found, they will be brought home, and the teen will receive a negative memory. The police may also bring back a teen who has been caught sneaking out.
If a Sim throws a party that has not ended by 11:00 PM, they will receive a visit from the police, who will break up the party. When the police arrive, the party will end immediately, unless cheats are used to remove the police car and officer.
In The Sims 2: University, if a Sim with a low aspiration bar uses the Genuine Buck's Famous Counterfeiting Machine aspiration reward, there is a possibility that a police officer will arrive and fine the Sim for counterfeiting money.
There is a 4:1 chance that the police officer will be a man rather than a woman.
List of police officers
The Sims 3
Much like The Sims 2, police that are called when there is a burglar on the lot will fight the burglar. If the officer wins, the burglar is arrested; otherwise the burglar makes off with the stolen items. If the burglar failed to steal anything on the lot before fighting the police officer, the burglar will flee empty-handed regardless if they won the fight or not. This usually occurs if a burglar alarm is placed on the lot. If called when there is no emergency, they will fine the Sims §200-§500, and will confiscate household items if the household does not have enough money. However, there are instances of a glitch occurring where the officer will not acknowledge the burglar and instead fine the household.
Occasionally, whilst the player's Sim is at work in the criminal career, a policeman/woman will come to arrest them. The Sim will then be detained at the police station for 12-24 Sim hours. Teens that violate curfew or get busted pranking[TS3:G] a school will be brought home by the police. In The Sims 3: Late Night and The Sims 3: Supernatural, vampires can get arrested if they raid the grocery or the hospital. In The Sims 3: University Life, Sims can get arrested if they streak or make street art. If a Sim goes into town naked[which?], the police will fine them §500.
List of police officers