They also face two counts of shooting with intent to kill related to the two people who were wounded, according to the press release from the district attorney's office.
Martin admitted five counts of unauthorised acts with intent to impair computer operation, three of unauthorised access with intent to commit other offences and one of unauthorised access to computer material.
He is charged with eight counts of unauthorised acts with intent to impair operation of or prevent or hinder access to a computer, and three of unauthorised computer access with intent to commit other offences.