The Texas Department of Public Safety runs the Highway Patrol, DPS Investigations, and the Texas Rangers. The Highway Patrol is pretty much the people who handle traffic control and enforcement out of major cities. DPS Investigations runs Auto Theft and Narcotics Investigations. The Texas Rangers are the ultimate elite of Texas law enforcement. The handle public corruption, law enforcement corruption, officer involved shootings, cold cases, murder investigations, and others where they are asked to come in and investigate. They are the Anti-FBI in that they actually look for the truth instead of going for convictions regardless of the facts. In my job I work with the Rangers regularly.
The Texas Attorney General has investigators who handle Human trafficking cases, and cases of major fraud. The Insurance Board has investigators who handle insurance fraud. The Pharmacy Board has investigators who handle prescription fraud and licensing for pharmacy thefts.
We are pretty typical for most Sheriff's Offices in that we have the following units (divisions):
Patrol- the bread and butter of any department. We have four shifts which overlap somewhat and the guys work a 5 on/4 off, 6 on/4 off rotating schedule.
Investigations- We break it down into People and Property crimes, although since there are so few of the guys, if they are on call, they catch it, they clean it. So a property guy can work a people crime. Then there is me and my investigator we are Special Investigations (Cold cases, Internal Affairs, Jail Investigations and Special Investigations (sensitive type)) which keeps me really busy.
Admin- this section has Courthouse Security, Civil process (subpoenas, and other court process), Warrants, Dispatch, and support staff.
Most police departments in Texas are similar. Many smaller agencies, the Patrol guys are also the investigators. Most departments in Texas have fewer than 20 officers. There are many that have only 1-2 full time staff.
How is the relation to state police? the texas Rangers? And whatever alse law enforcement Texas may have?