This section applies only in Somerset County. The State’s Attorney’s salary is 80% of the salary of a judge of the District Court of Maryland. The State’s Attorney may appoint a deputy State’s Attorney who shall: serve at the pleasure of the State’s Attorney; and present cases to the grand jury, sign indictments and criminal informations, and perform other functions necessary to the operation of the office and as directed by the State’s Attorney or as authorized by law. The county commissioners shall set a salary for the deputy State’s Attorney that may not exceed the salary of the State’s Attorney. The State’s Attorney may: appoint one or more assistants at salaries that the county commissioners set; and hire one or more investigators at salaries provided in the county budget. The State’s Attorney may not engage in the private practice of law.