Kristopher Baumann, 39, heads the D.C. police union. After graduating from the University of California, Los Angeles, he joined a small police department in Oregon, where he earned a law degree. He then got a master’s degree in tax law at New York University. Baumann moved to D.C. to work as a lawyer at the U.S. tax court, but missed police work and joined the Police Department in 2002.

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