Lester Joseph Gillis (December 6, 1908 – November 27, 1934), known by the alias George Nelson and Baby Face Nelson, was an American bank robber.
He was given the nickname Baby Face Nelson due to his small stature and somewhat youthful appearance, although few dared call him that to his face.
Criminal associates instead called him "Jimmy".
He became partners with John Dillinger, helping him escape from prison in Crown Point, Indiana.
Nelson and the remaining gang members were labeled as public enemy number one.
Nelson was responsible for killing more FBI agents than any other person.
He was fatally shot by FBI agents during a shootout called The Battle of Barrington.