Michael Bethke is an American citizen from Calumet City, Illinois, who killed and decapitated Joseph Lesinski, his 49-year-old co-worker at the Burnham, Illinois, White Hen Pantry grocery store, on June 6, 1991.

Described as having "chronic paranoid schizophrenia", Bethke was found not guilty by reason of insanity and sentenced to up to 49 years in a state mental institution.