LaRose & Bosco, Ltd. added Costa J. Diamond and David J. Aron as equity partners.Diamond focuses his practice on representing clients in complex civil litigation, including personal injury and wrongful death, construction and commercial litigation, aviation law, and legal and professional malpractice claims. Diamond also handles business and real estate transactions for the firm.Aron focuses his practice on litigation and represents clients in litigation matters, including personal injury and wrongful death, medical …