June 18, 1909 - John Haigh
His method was methodical rather than frenzied — killing for financial gain, then using sulphuric acid to dissolve the evidence before forging signatures and liquidating his victims' assets. The combination of murder, fraud, and near-total destruction of physical evidence made him one of the more forensically calculated killers of postwar Britain, and the case became a landmark in the history of forensic investigation.
From Wikipedia
John George Haigh ( HEYG; 24 July 1909 – 10 August 1949), commonly known as the Acid Bath Murderer, was an English serial killer convicted for the murders of six people, although he claimed to have killed nine. Haigh battered to death or shot his victims and disposed of their bodies using sulphuric acid before forging their signatures so he could sell their possessions and collect large sums of money. His actions were the subject of the television film A Is for Acid.
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