Police officers may still go for training while still at work. You see, in order to learn more skills on how to become a police officer /Justice.gov you must also be willing to continually train on the new techniques that make you an effective police officer. You may get additional info on how to become a police officer through such training. Remember that social skills are also very important. Basically, you will be dealing with people. You therefore need social skills in order to relate well with other people. In fact communication is a very wide subject that I covered in such training. One must be willing to spend some time in training on communication skills.
One many also be concerned about the rate at which such services are offered. In some cases, training is free if you are already in the police force. But some police academies will charge you for their services. But the services are subsidized so you end up paying less money for the service. It is therefore a good idea to ensure that you review such info and also provide feedback to the training colleges so that they can improve their services. In future ensure that you get info regarding such institutions of higher learning so that you can make an informed decision.