Possibly two of Scotland's most gruesome imports were the serial killers William Burke and William Hare. Burke and Hare hailed from Ulster and moved to Scotland to work as labourers on the Union Canal. Ever aware of needs of the market, Burke and Hare set themselves up as procurers of human bodies to satisfy the demand of Edinburgh's medical schools.
Originally the two would dig up the graves of the recently departed in the dead of night, steal the body and then sell it for cash to a doctor for use during anatomy demonstrations. Tired of digging, the two entrepreneurs started murdering people in Edinburgh's old town and selling their cadavers on an "ask no questions basis." They killed their victims by strangling them using a method they had perfected which left no obvious trace of foul play and little evidence of the murder.
The murder of their 16th victim led to their arrest. Burke's mistress and Hare's wife were also arrested. Because the courts had little evidence to prosecute them successfully, the Lord Advocate, Sir William Rae, offered Hare immunity from prosecution if he would turn King's evidence. The evidence Hare and his wife provided sent Burke to his death on the gallows on 28 January, 1829 while his mistress Helen MacDougall escaped when the charges against her were found not proven.
William Hare is said to have died a penniless pauper in London in 1859. Robert Knox - the doctor who willingly bought most of Burke and Hare's bodies was never prosecuted.