The introduction of the government's tariff-setting procedures in 1983 also came shortly after a number of murderers were convicted of widely reported crimes. 1983 was also the year in which Dennis Nilsen was jailed for life for murdering 11 young men whose dismembered bodies were found at the two flats he had rented in North London. Two years earlier, "Yorkshire Ripper" Peter Sutcliffe had been found guilty of murdering 13 women and attacking seven others in a six-year spree. Nilsen and Sutcliffe remained in prison until their deaths in 2018 and 2020 respectively.