In any action brought by the Commonwealth to enforce this article or Article 1 (§ 3.2-4200 et seq.) of this chapter in which the Commonwealth prevails, or as part of the settlement of any matter arising from an investigation prior to the filing of such action, and in addition to any civil or criminal penalty or other amount which the court may determine, the Attorney General shall be entitled to recover the reasonable costs of investigation, expert witness fees, costs of the action and reasonable attorneys’ fees.