From Wikipedia

The Lobotomist

Walter Jackson Freeman II, M.D.
 (November 14, 1895 – May 31, 1972)
was an American physician who specialized in lobotomy. He was a member of the American Psychiatric Association. Freeman performed nearly 2500 lobotomies in 23 states, mostly based on scanty and flimsy evidence for its scientific basis, but more significantly he popularized the lobotomy. A neurologist without surgical training, he initially worked with several surgeons, including James W. Watts. In 1936, he and Watts became the first American doctors to perform prefrontal lobotomy (by craniotomy in an operating room).