Less than two months later, on April 7, Dahmer encountered a 19-year-old named Errol Lindsey[156][157] walking to get a key cut. Lindsey was heterosexual. Dahmer lured Lindsey to his apartment, where he drugged him, drilled a hole in his skull and poured hydrochloric acid into it. According to Dahmer, Lindsey awoke after this experiment (which Dahmer had conceived in the hope of inducing a permanent, unresistant, submissive state), saying: "I have a headache. What time is it?"[158][159] In response to this, Dahmer again drugged Lindsey, then strangled him.