I found this older article form 9/21/12 on the lawsuits that explains a little more. Don't think security guards could have stopped this though.
Why was this filed in Federal court?
Operators of the Aurora theater where 12 moviegoers were slain this summer had no security guards on duty the night of the shootings and no plans for keeping anyone from sneaking out of or back into the theater, according to two new lawsuits filed Friday.
The lawsuits, filed in federal court in Denver by three victims of the theater shooting tragedy, allege a pattern of lax security at the Century Aurora 16 theater that enabled the attack that also wounded 58 patrons. They are the first lawsuits to be filed in relation to the shootings.
Cinemark, the owner of the theater, is named as the suits' defendant.
....
http://www.denverpost.com/ci_21602133/aurora-theater-shooting-victims-file-suits-against-cinemark
According to the complaints, the theater had no security guards on duty for the midnight showing of "The Dark Knight Rises," though guards had been at the theater on July 19, a Thursday.
Security personnel, including off-duty Aurora police officers, normally staffed the theater only on Friday and Saturday nights, even though the theater had a history of assaults, robberies and at least one gang-related shooting, the lawsuits allege.
The lack of security guards allowed the gunman to continue shooting inside the theater for several minutes unconfronted, according to the complaints.
More....
http://www.denverpost.com/ci_21602133/aurora-theater-shooting-victims-file-suits-against-cinemark
Why was this filed in Federal court?
Operators of the Aurora theater where 12 moviegoers were slain this summer had no security guards on duty the night of the shootings and no plans for keeping anyone from sneaking out of or back into the theater, according to two new lawsuits filed Friday.
The lawsuits, filed in federal court in Denver by three victims of the theater shooting tragedy, allege a pattern of lax security at the Century Aurora 16 theater that enabled the attack that also wounded 58 patrons. They are the first lawsuits to be filed in relation to the shootings.
Cinemark, the owner of the theater, is named as the suits' defendant.
....
http://www.denverpost.com/ci_21602133/aurora-theater-shooting-victims-file-suits-against-cinemark
According to the complaints, the theater had no security guards on duty for the midnight showing of "The Dark Knight Rises," though guards had been at the theater on July 19, a Thursday.
Security personnel, including off-duty Aurora police officers, normally staffed the theater only on Friday and Saturday nights, even though the theater had a history of assaults, robberies and at least one gang-related shooting, the lawsuits allege.
The lack of security guards allowed the gunman to continue shooting inside the theater for several minutes unconfronted, according to the complaints.
More....
http://www.denverpost.com/ci_21602133/aurora-theater-shooting-victims-file-suits-against-cinemark