including Kellerman. He was confined to desk duty during this time, which greatly angered him because he felt it marked him as guilty. He had, in fact, been the only one of four officers investigated who had not taken money from a pair of arsonists (Matthew Roland and his son, Mitchell). Giardello went to BPD Commissioner James C. Harris on Kellerman's behalf, only to learn that no help would be coming from the upper levels of the BPD's command structure – due to a combination of political motivation and Harris' personal dislike of Giardello. Kellerman refused to testify against his fellow cops, but was not indicted; the U.S. Attorney in charge of the investigation later told him that she saw him as a good cop trying to do his job, but did not understand why good cops would choose not to turn in bad ones. Despite not being indicted, Kellerman became convinced that no one within or outside the BPD would ever believe that he was not corrupt. Falling into intense depression and reeling from another case of Luther Mahoney getting away with murder, Kellerman became increasingly angry and almost committed suicide. Lewis managed to calm him down and take his gun, after which Kellerman took some time off. During his confinement to desk duty, Kellerman met the new medical examiner, Dr. Julianna Cox, who had just lost her father. They consoled each other with a one-night stand, then developed a rough-edged, informal relationship that continued until Cox was fired and left Baltimore in the sixth season. Before leaving, she hinted to Kellerman that she might have decided to stay in the city if they had been able to form a real relationship. The Mahoney saga Kellerman and Lewis were put in charge of a string of murders linked with drug kingpin and crime lord Luther Mahoney (Erik Todd Dellums). Innocents and gangbangers alike fell because of Mahoney, but there was never enough evidence to prosecute him for any of the crimes. Eventually, a drug mule who had been transporting heroin from overseas was discovered dead in his motel room after one of the heroin-laden condoms in his stomach burst. The police decided to swap the shipment with fake heroin, leading to a huge upset in his industry. Mahoney was monitored going to a meeting with one of his lieutenants—a meeting where he executed the lieutenant and inadvertently shot a