Dahmer would keep trophies of his victims, he would cut of their heads, boil off the flesh polish and paint them and keep them in his house. He would also take polaroids of his victims as he dismemberd them and he would keep parts of their anatomy and freeze, preserve or eat them (i.e. heart, liver, flesh, penis and testicles, et cetera . . . )
Dahmer was caught and imprisoned in 1991 and was found guilty of 15 murders, he was sentenced to something like 940 years.
In 1994 he was beaten to death in prison.