Incidentally, murder is still a common law offence but it has been changed by Act of Parliament. The definition which generations of students learn comes from that given in a textbook of 1797, Coke's [pronounced Cook's] Institutes, which itself summarised the law as the author understood to be from past judicial practice. But that included the words "the death occurring within a year and a day", because it was thought that a victim dying beyond that period after the assault could not be fairly thought to have died in consequence of it. That rule still applies to such fatal assaults occurring before June 16 , 1996, but after that the Law Reform (Year and a Day Rule) Act applies