"The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy."

Rev. Martin Luther King, Jr.

We are an all volunteer organization of specially trained men and women who serve the residents of Maricopa County Arizona by providing law enforcement support services to the Sheriff.


What is a Posse?

The modern day Sheriff's Posse has its roots in Saxon England over 11 centuries ago.  In those days, the Reeve was the king's officer and representative in each shire or county. The Shire Reeve, from which the word Sheriff has evolved, had the authority to enlist the assistance of males of the county, above the age of fifteen, to assist him in keeping the peace or in the apprehension of criminals.  To do this, he would raise a 'hue and cry' to summon residents, who were obligated to respond to the Sheriff's call.  This group was known as the Posse Comitatus, which is Latin for "power or force of the county." This system was brought to the new world with the colonists who elected sheriff's as the first law enforcement officials in their new land, over 100 years before the start of the Revolutionary War. To this day, our sheriff, who is the Chief Law Enforcement Officer for Maricopa County, has the authority to raise a posse and is the only person who has this authority.


Mission Statement of the Sheriff's Office

The Maricopa County Sheriff's Office, in partnership with our citizens and contract cities, will enforce state laws, deter criminal activity, protect life and property, maintain order, and operate a safe, constitutional jail system.  

About MCSO-ESP


Enforcement Support Posse

Our Values 

  • Family comes first. 
  • Integrity matters.
  • Justice should prevail. 
  • Service above self. 
  • Honesty is a given. 
  • Humility is a gift. 
  • Assist the Sheriff and Deputies.
  • Serve our fellow citizens.