Law enforcement
From Halopedia, the Halo wiki
The Civilian Security Forces, or more popularity known as Law Enforcement, are police units used on the colonies of the UNSC Colonial Administration. During the Battle of Harvest, CSF constables were on foot, patrolling the Gladsheim mall [1]. They wore helmets, riot plating, and were armed with stun devices and plastic shields. Two other constables named Finn and Lars were the personal bodyguards of Governor Thune [2].
Weaponry
They use lighter weaponry than their military counterparts.
