Sid Vicious  (born John Simon Ritchie; 10 May 1957 – 2 February 1979), was an English bass guitarist, drummer and vocalist, most famous as a member of the influential punk group the Sex Pistols, and notorious for his arrest for the murder of girlfriend Nancy Spungen.  Vicious joined the Sex Pistols in early 1977, to replace Glen Matlock, who had fallen out of favour with the rest of the group.  Vicious was hospitalized during the recording of the band’s only studio album, and his bass is only partially featured on one song from Never Mind the Bollocks, Here’s the Sex Pistols.  Vicious would later appear as a lead vocalist, performing three cover songs, on the soundtrack to The Great Rock ’n’ Roll Swindle.  (More from Wikipedia)