Can you earn good time if you are in prison for murder in the state of Texas?

Yes, You get two for one in the State of Texas in 1963. Good

time law Changes so find out the year you want the good time you need. Now they are getting much more good time on there sentences. Please look it up in the Texas Civil Statutes under Penitentiaries or the Government Code under Penitentiaries. In 1963 they discharge there sentences. Then the next few years they mandatory supervision you to parole. Get the year you want then research it in the Government Code under "Penitentiaries."