"We warned them. If you break the law, we will arrest you."

After Hundreds Of Protesters Block Texas Highway – The Police Chief Whips Out 647 Zip-Tie Handcuffs

Nearly 700 people blocked a major highway in the city and though peaceful, they were breaking the law.

And they chose not to listen to the police warnings about being arrested (via The Daily Wire):
Dallas Police Chief Renee Hall took the individuals into custody and hit with at-large arrest charges after they blocked a major highway in the city.

After blocking the Margaret Hunt Hill Bridge, 647 protesters were put in zip-tie handcuffs.

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Don't Mess with Texas!