Which serial killer killed his girlfriend?

One notorious serial killer who killed his girlfriend is Jeffrey Dahmer. He was an American serial killer and sex offender who murdered and dismembered 17 young men and boys between 1978 and 1991. Among his victims was his girlfriend, who he killed in a fit of rage. Dahmer's crimes also involved acts of necrophilia and cannibalism, making him one of the most infamous figures in criminal history.