The Penal code of TX is easy to search. http://www.statutes.legis.state.tx.us/
Look at Chapter 46 on weapons and search for silencer. http://www.statutes.legis.state.tx.u.../htm/PE.46.htm
Sec. 46.05. PROHIBITED WEAPONS. (a) A person commits an offense if he intentionally or knowingly possesses, manufactures, transports, repairs, or sells:
(1) an explosive weapon;
(2) a machine gun;
(3) a short-barrel firearm;
(4) a firearm silencer;
(c) It is a defense to prosecution under this section that the actor's possession was pursuant to registration pursuant to the National Firearms Act, as amended.
In other words you can be arrested for mere silencer possession in TX, but showing them the registration form protects you from prosecution. I have never heard of anyone being arrested for silencer possession in TX as long as they had their registration form on them and showed it to the police.
The ATF routinely authorizes the sale to and making of silencers by unlicensed persons in TX.
I have heard of prosecutors in various states using the "unusual" nature of a certain firearm against a person charged with a crime. I so not store my home defense firearms with silencers attached, so I would not be using them suppressed. I figure the disorientation from the loud noise would affect the perp more than it would me, so I do not see using a silencer as an advantage. But then I have never shot (or at) a person, so I do not know for sure how things would work out.