The eight-year-old Brooklyn boy who was kidnapped and murdered by Levi Aron last week had been drugged before being killed, according to a medical examiner in the case.

NBC News in New York reported that the medical examiner said the child victim, Leiby Kletzky, was given muscle relaxant, anti-psychotic drugs, painkillers and Tylenol before he was smothered to death and dismembered.

The anti-psychotic drug, quetiapine, is typically used to treat symptoms of schizophrenia.

Aron is likely to face a grand jury indictment Wednesday in connection with the horrific killing.

Aron has pled not guilty to charges of first-degree murder and kidnapping. His lawyers have said that their client “hears voices” and suffers from hallucinations.