One of the first cases to use modern forensic evidence was one known as `the Acid Bath Murders`.  John George Haigh, a serial killer convicted and sentenced to death in 1949, murdered from a combination of bizarre psychological (he drank his victim`s blood) and financial motives. He was eventually found to have killed six women although he claimed a total of 9 victims..

He is known as the 'acid bath' murderer because he disposed of the bodies by dissolving them in a vat of sulphuric acid. When police examined the sludge left by this process, they found remains including dentures and gallstones that were used as evidence in the trial and were instrumental in convicting Haigh.