Barry Wallace went to a Christmas night out with workmates
BBC News Online Scotland traces the two-year route to trial and conviction.
5 December 1999: Barry Wallace fails to return home after a works night out in Kilmarnock.
6 December 1999: Police divers on a training course find human limbs in Loch Lomond, north of Glasgow. A full scale search recovers more body parts in the days ahead.
15 December 1999: A human head is found on Barassie Beach, near Troon, by a woman walking her dog.
21 December 1999: Police are granted a warrant for the arrest of William Beggs.
23 December 1999 In a rare legal move the Crown Office allows Strathclyde Police to issue a picture of William Beggs.
28 December 1999: William Beggs is arrested in the Netherlands after he walks into an Amsterdam Police station with a lawyer.
30 December 1999: A Dutch lawyer representing William Beggs says his client will fight extradition proceedings from the Netherlands to Scotland.
9 January 2000: Police divers recover more body parts, belonging to Barry Wallace, from Loch Lomond.
14 January 2000: The Crown Office confirms that it has made a formal request to the Dutch authorities for the extradition of William Beggs.
29 February 2000: Barry Wallace is laid to rest at Grasards Cemetery in Kilmarnock - 87 days after he was last seen alive.
28 March 2000: William Beggs' extradition hearing opens in Amsterdam District Court of Justice.
11 April 2000: The Dutch court grants the extradition of William Beggs to Scotland.
25 April 2000: Dutch lawyers acting for William Beggs lodge an appeal, to the Supreme Court of the Netherlands, against his extradition.
26 September 2000: The Dutch Supreme Court rules that Beggs should be extradited but the decision is referred to the country's justice minister.
15 November 2000: Dutch Justice Minister Benk Korthals upholds the decision to extradite Beggs to Scotland.
22 November 2000: Beggs' legal team launch a last ditch challenge to the extradition order in the Dutch Civil Courts. They argue that media coverage in Scotland has jeopardised his chance of a fair trial.
5 January 2001: The Dutch Court of Justice in the Hague rules that Beggs must be extradited to Scotland to face trial for the murder of Barry Wallace.
9 January 2001: Beggs is extradited to Scotland. He arrives at Edinburgh Airport under police escort.
11 January 2001: Beggs appears in private at Kilmarnock Sheriff Court. He makes no plea or declaration.
18 September 2001: Beggs goes on trial at the High Court in Edinburgh for the murder of Barry Wallace.
12 October 2001: Beggs is convicted of handcuffing, injuring, sexually assaulting and murdering Barry Wallace before dismembering his body.