Superior Court Judge Michael C. Clark will retire as presiding judge of the 9th Judicial District on Feb. 28. As a judge, he presided over 100 jury trials and disposed of more than 20,000 cases, including the case against Bart Corbin, a dentist who was charged with two murders that took place a decade apart. After his retirement, Clark will go into private practice with the law firm Oxendine & Sauls LLC, which will be renamed Clark, Oxendine and Sauls LP.