Murder-accused who killed and decapitated his wife found not guilty by reason of insanity

Trial heard due to cannabis-induced psychosis, Diego Costa Silva did not know the nature and quality of his actions and did not know that what he was doing was wrong

Trial heard due to his mental disorder, Diego Costa Silva had come to believe his wife was possessed by a serpent and that she would kill him.

WARNING: Some readers may find the following article upsetting

Diego Costa Silva, who cut his wife's head off while suffering from a cannabis-induced psychosis, has been found not guilty of her murder by reason of insanity by a jury at the Central Criminal Court.