Frederick Griffith
Griffith was killed at work in his laboratory in 1941, along with longtime friend and bacteriologist William M. Scott in London during an air raid in the London blitz. Years later Griffith's "transforming principle" was identified as DNA by Oswald Avery, along with coworkers Colin MacLeod and Maclyn McCarty, in 1944. The Avery–MacLeod–McCarty experiment.