The Burke and Hare murders were a series of sixteen murders committed over a period of about ten months in 1828 in Edinburgh, Scotland. They were undertaken by William Burke and William Hare, who sold the corpses to Robert Knox for dissection at his anatomy lectures. Edinburgh was a leading European centre of anatomical study in the early 19th century, in a time when the demand for cadavers led to a shortfall in legal supply. Scottish law required that corpses used for medical research should only come from those who had died in prison, suicide victims, or from foundlings and orphans.
https://en.wikipedia.org/wiki/Burke_and_Hare_murders