Mr. Buckner (first name unknown) is the president of Allgen Corporation, a pathogen sample distributor. The diseases would make their way into the hands of illicit and questionable patrons, often for illegal purposes. Buckner and the other executives would silence witnesses even in their own employees, firing Hyram Jenkins over him demanding background checks.
When Aaron Downing purchased a culture of VRSA to kill his son Ryan win, the purchase was traced to Allgen. They stymied giving their records, so McCoy took Buckner to court on charges of complicity with Ryan's murder. After enough legal back-and-forth, Buckner eventually agreed to a fine for his damages. However, McCoy blindsided the executives with a fine higher than their profits, which the judge still agreed to in the interest of the company working to pay the debts, a court-appointed overseer running the business until then. (L&O: "Flight")