Google the person's name with something like "Texas Prison System," "Texas Penitentiaries," or even "Jails in Texas." You may even try something like "Convicts in Texas" or "Texas State Jails." As you pull up each prison, see if there is an option that will let you see if the person you are looking for is in that particular prison. This may take a while, since there are quite a few jails and prisons in Texas, but if you keep at it, I 'm sure you will find the person you are looking for. You may even have some luck by calling a jail or prison nearest you and asking them for advice on how to find the person.