Ecstasy and heroin were among the substances supplied by a Berlin therapist who said he aimed to "expand consciousness" during a session that killed two patients, German papers are reporting. Another patient remains in a coma. All 12 participants were rushed to a hospital after they fell ill during the group therapy, reports the BBC. The doctor has been arrested. He has admitted to police he passed out the drugs, and that his wife also took part in the deadly session.