To be honest, two weeks or not, if a car is stolen it's probably gone forever. It's not like the police are going to assign a detective track down Hertz's stolen car. They stick it on the system and if it happens to pass an officer they'll stop it. The probelm is, the only way it'll ping an officer is if it's still being driven around the area with the same number plates - ie, the probability of it actually being stolen are minimal.