( CNN ) -- The trial of James Holmes , the gunman in the massacre at a Colorado theater last year , will no longer begin in February . Judge Carlos Samour vacated the trial date at a hearing Thursday . A new date was not set immediately . A hearing is scheduled for December 11 . Holmes ' attorneys have acknowledged that he was the shooter . In a court filing , they argued that he was in `` the throes of a psychotic episode . '' In July 2012 , Holmes opened fire at a midnight showing of `` The Dark Knight Rises '' at the Century Aurora 16 Multiplex Theater , in Aurora , just outside Denver . He killed 12 people and wounded 58 others . Holmes , now 25 , is charged with 152 counts . He pleaded not guilty by reason of insanity . CNN 's Shawn Nottingham contributed to this report .
James Holmes ' trial was scheduled to begin in February . The judge has ordered a new hearing on the issue of whether he can be tried as an adult or juvenile and set sentencing for March 5. Holmes ' attorneys have acknowledged he was the gunman .