The Phoenix Police sent a letter that was posted on Rick Sanchez's CNN Blog about AR-15

Ernest Hancock

The purpose is to encourage an open dialogue and address issues.
When it comes to demonstrations, open communication with those who plan on demonstrating is critical to the public safety.
The building up of trust with these groups enables us to understand their intent, to plan accordingly, and to explain to them the law and what the parameters are with law enforcement.
We work with our federal, state, and local partners who work events with us and share public safety information.
The purpose of the meeting with the person in question you asked about was to facilitate good communication and understanding of the group’s plan, our response, and the parameters within which we would work to protect the public and enforce the law.
Their demonstration was met with our public safety plan, and the result was no law violations, no arrests, and a safe public.”