srothstein wrote:I am not truly sure what law gives the federal agents or the Guard any legal authority to give orders or make arrests. I think they may be considered to be called by officers to assist under the Code of Criminal Procedure section 2.14 but I really don't know. I guess you could say their guns and numbers gives them all the authority they need, but I would assume we have some laws somewhere that back it up.
For state forces, TGC § 431.111(b) below I think is the answer.....
§ 431.111. CALLING OF FORCES BY GOVERNOR. (a) The
governor may call all or part of the state military forces to repel
or suppress an invasion of or insurrection in or threatened
invasion of or insurrection in the state or if the governor
considers it necessary to enforce state law. If the number of state
military forces is insufficient, the governor shall call the part
of the reserve militia that the governor considers necessary.
(b) The governor may call all or part of the state military
forces to assist civil authorities in guarding prisoners, conveying
prisoners within the state, or executing law as the public interest
or safety requires.