This is the best summary I could come up with:

They pulled Jivani over at a nearby gas station and accused him of violating a city ordinance meant to combat prostitution.

The complaint against Jivani says he was in the 11100 block of Shady Trail, in an area frequented by prostitutes, and stopped to engage passersby in conversation.

Gary Krupkin, Jivani’s attorney, told the Observer he works many First Amendment cases, but this is the first time he’s had a client cited under the ordinance.

– Gary Krupkin, attorney tweet this Municipal Court Judge Jay Robinson wrote in his decision that a law is too broad if it punishes both constitutionally protected conduct and illegal activity.

Wade wrote that the ordinance targets lawful behaviors, such as talking to passersby and waving at cars, and that enforcement is up to officers' discretion, raising the threat of bias.

In emails obtained by The Dallas Morning News, police officials said the ordinance won’t be enforced until after discussions with the city attorney’s office.

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Ah yes, Texas, where you're free to go to jail just for existing!