These peace officers are the first link in the county’s chain of law enforcement.
Along with their duties, constables have all the enforcement of Texas peace officers. They are sometimes referred to as the executive officer of the justice of the peace courts. Their duties are:
The constable may also assist the county and district courts. In addition, they may perform patrol functions and make criminal investigations. They are involved in the overall effort to reduce the effects of crime in their communities, including in some cases the operation of truancy programs.
Duties & Responsibilities of the CONSTABLE from the Texas Association of Counties.