New Texas Governer Appointed
Johnson needed a new governor because if you did not agree to secesion he would have to kick them out of the government and appoint a new one. Texas's governer resigned and that let to picking Andrew Hamilton.
The delegates at the constitutional convention were mostly confederate and they did not want freedmen to have any rights. They were angry at the fact that they were even freed. Yes the convention was bias because most of the people were confederate.
A New Constitution
Instead of writing a new constitution the delegates amended the constitution Texas had before the civil war. The amendments were important. They notified secession and the states war debt and ablish slavery. The cons,titution of 1866 stopped short of granting African American Texans equal rights. Freed people owned the right to own property and to enter into contracts.
When ex confederates took control and refused to ratify the 13th and 14th amendments to the US constitution. The thirteenth amendment outlawed slavery was refused and as well as the fourteenth amendment which protected the right of a former slave.
Black code were created by mean and racist people that reduced the rights of black people and it stopped them from voting, serving of juries, and could not testify against whites in court.