Dozens of people who were child patients at a psychiatric hospital in the 1960s and 70s claim they were experimented on with a so-called truth serum. I was your typical 60s teenager," says Marianne. At the age of 14, she [was] sent to Aston Hall, a "mental deficiency hospital". Many claim they were experimented on by the hospital's medical superintendent Dr Kenneth Milner using a drug called sodium amytal. It is known as a "truth serum" for its supposed ability to retrieve ... memories. Former patients ... remember being locked in a small treatment room with a mattress on the floor. Some say their hands were tied with bandages before they were injected. Marianne says she had an internal examination in the room, which was embarrassing and unnecessary, and other patients have alleged sexual abuse by Dr Milner. [She] recalls a session with the doctor where she was stripped, made to wear a stiff white gown and told she would be asked some questions. Then he injected her with a drug that heavily sedated her. "I can remember equating it to being drunk." Her account is similar to those of other former patients at the time, who remember being locked in a small treatment room with a mattress on the floor. Some say their hands were tied with bandages before they were injected. Nearly all the patients we spoke to agreed Dr Milner asked very personal sexual questions during treatment. While former patients search for answers about what really happened to them, they may have to live with the harmful effects of the treatment for the rest of their lives.