Ernst August Ferdinand Gennat (1 January 1880 – 20 August 1939) was director of the Berlin criminal police. He worked under three political systems in his 30-year career as one of the most gifted and successful criminologists in the German Reich. His caseload included those of Fritz Haarmann and Peter Kürten.
Ian Carr (21 April 1933 – 25 February 2009) was a Scottish jazz musician, composer, writer, and educator. Carr performed and recorded with the Rendell-Carr quintet and jazz-fusion band Nucleus, and was an associate professor at the Guildhall School of Music and Drama in London. He also wrote biographies of musicians Keith Jarrett and Miles Davis.