Once I read about a guy who killed his girlfriend under the influence of PCP, but when police dragged him in he couldn't remember any of it. They even tried administering a "truth serum" to the guy, but he couldn't remember any of it. During the court proceedings, they had to keep him in a separate room so that he couldn't see the evidence, because it could compromise his testimony. He was found not guilty for reason of insanity and sent to a mental hospital, where he had a seizure which caused him to recall every single detail of the murder, relived in his head, over and over again. He tried to kill himself several times. The kicker is that the murder as he recalled it was perfectly consistent with the forensic evidence that was never revealed to him in the trial or the police investigation.
So yeah, don't do PCP, kids.