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