In the United States Constitution under Article IV it states:
The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and the several States, shall be bound by Oath or Affirmation, to support this Constitution...”
Just ask the Police Chief to say that he has taken an oath to support the Constitution, including the First Amendment (”Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof...” ) and he is not sure that the judge is right about his view of the Constitution.
The Police Chief then announces that while the lawsuit slowly wends through the courts, no one is getting arrested today.
How can the police arrest someone if no crime has been committed?
It’s not illegal to pray in public (yet).
A judge can claim that disobeying his ruling is contempt of court, but that is not settled yet either. If the judge is going to make a decision contrary to the Constitution, is it legally binding?
The judiciary is not in the position of having the authority to make laws, only to determine if a law has been violated. Making laws is the responsibility of the legislature.
If the boy and his parents don’t want public prayer at the graduation, then they should petition to have the law changed, through the proper channels. They can spend their time and money to advocate for this change and see what the Texas State legislature or the federal legislature decide.
And maybe the best thing to do would be to have a bunch of people get arrested and take it to court. It’s well past time the issue was forced to be dealt with. I don’t think it would stand a snowball’s chance. There would be far too much outcry.