Lionel Dahmer, who is 86 years old and an American citizen, hails from West Allis, Wisconsin. He had a career as an analytical chemist and also ventured into entrepreneurship. He’s widely known as the father of Jeffrey Dahmer, a notorious figure in the United States. Jeffrey, his son, was a criminal, infamous as a serial killer and sex offender, and he gained notoriety with nicknames like the Milwaukee Cannibal or the Milwaukee Monster.