The secrecy that enshrouds the investigation into a biker shootout in May that left nine people dead is hardly surprising in Waco.

The Texas city and surrounding county are largely run by a close-knit circle of judges, prosecutors and law enforcement officers who defense lawyers accuse of allowing local agencies to unfairly close ranks in the aftermath of the incident.

Authorities here have been criticized for how they've handled the investigation, including the mass arrest of more than 170 people who were held for days or weeks on $1 million bonds and the lack of evidence presented to support those arrests four months after the shootings.

The violence erupted at a restaurant before a meeting of a coalition of motorcycle clubs that advocates rider safety.