A criminal defense lawyer is a lawyer specializing in the defense of individuals and companies charged with criminal activity. Some criminal defense lawyers are privately retained, while others are employed by the various jurisdictions with criminal courts for appointment to represent indigent persons; the latter are generally called public defenders. The terminology is imprecise because each jurisdiction may have different practices with various levels of input from country to country. Some jurisdictions use a rotating system of appointments, with judges appointing a private practice attorney or firm for each case.