Matthew Grant Webster , an 18-year-old who acted as a bouncer at the event , pleaded Request guilty to her murder Committing_crime and was sentenced Legal_rulings to 20 years in prison with a 14-year non-parole period .

Webster 's confession did not match Competition the forensic evidence .

This frenzy regarding Madonna gave rise to Causation a new term called Name_conferral Madonna wannabe—a word that was ultimately officially recognized Know by the Webster 's Dictionary in May 1991 .