Which figure was instrumental in establishing law enforcement principles in Texas?

The figure who was instrumental in establishing law enforcement principles in Texas is Stephen F. Austin. Known as the "Father of Texas," he played a crucial role in the early development of the region including its governance and law enforcement structures. Austin was significant in laying the groundwork for the establishment of a legal system in Texas, advocating for law and order during a time when the area was being settled and requiring formal regulatory frameworks. His efforts helped shape the way law enforcement would be organized and function in the early days of Texas, highlighting the importance of leadership and civic responsibility.

While other figures like August Vollmer, Robert Peel, and J. Edgar Hoover have made significant contributions to law enforcement principles more broadly, particularly in other regions or contexts, they do not hold the same foundational role in the context of Texas law enforcement that Austin does.