Time served in jail harris county tx?

my son got 6 months in harris county detention center jail not juvey. the lawyer said that he would only half to serve half of that with good behavior. does any one know if and how it works i guess its like 2 days for every one day that you are good. the judge did not say anything about this all he said was 6... show more my son got 6 months in harris county detention center jail not juvey. the lawyer said that he would only half to serve half of that with good behavior. does any one know if and how it works i guess its like 2 days for every one day that you are good. the judge did not say anything about this all he said was 6 months. we are new to this and dont know what to beleive or who else to ask. so if you know anything about this. please reply
2 answers 2