Romulus Vereș (Cluj, January 23, 1929 – Ștei, December 13, 1993) was a notorious serial killer from Romania, better known as "The Man with the Hammer". During the 1970s, he was charged with five murders and several attempted murders, but never imprisoned on grounds of insanity; he had schizophrenia, blaming the Devil for his actions. Instead, he was institutionalised in the Ștei psychiatric facility in 1976, following a three-year-long forensic investigation during which four thousand people were questioned.