A video of Michael DeHerrera being attacked without apparent provocation by a Denver cop
has gotten plenty of attention, with Mayor John Hickenlooper calling for the FBI to review the case
after his manager of safety declined to sack the officers involved. But another video -- of Marvin Booker, who died in Denver jail on July 9 -- hasn't been made public, despite media demands. And the DA's office is getting frustrated explaining why not.