Published: Mar 28, 2013 9:43 PM EDT

DENVER (AP) - Prosecutors said Thursday they are not ready to accept an offer from Colorado theater shooting suspect James Holmes to plead guilty in exchange for avoiding the death penalty.
    
In a court filing, prosecutors criticized defense attorneys for publicizing Holmes' offer to plead guilty, calling it a ploy meant to draw the public and the judge into what should be private plea negotiations.
    
They say the defense has "steadfastly and repeatedly" refused to provide key details they need to consider a plea.
    
No agreement exists, and one "is extremely unlikely based on the present information available to the prosecution."
    
Legal experts say the case pivots on whether Holmes was legally insane when he opened fire in a packed theater in Aurora, killing 12 people.