Police departments have always loved large, full size sedans - especially ones that come with rear-wheel drive. Unfortunately for them, automakers are discontinuing those models. However, the Chevrolet Impala continues to be quite popular with law enforcement. Due to its large trunk and other interior dimensions, the Impala makes an effective police car. Police can also have it with a V8 engine, now no longer available to civilians.
The question that remains is whether there is a future for the Impala. With the hugely successful Malibu making great profits for Chevrolet, the Impala almost sounds like it's no longer necessary. Within the next year or two, Chevrolet will decide whether to discontinue the Impala or replace it with a significantly upgraded model.