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Kurtz v State

The question in this appeal is whether an officer of the police department of a city has authority to stop a person for committing a traffic offense when the officer is in another city within the same county. We hold that the officer does not have such authority.

He was arrested for DWI.

Brendlin dealt with whether a passenger was seized.

A Peace Officer may detain someone if they have reasonable suspicion, though the detention must be brief. PC is needed for an arrest, search or a warrant.

You can also read Kurtis v State

Thus, its sole contention before this Court is that the officers had reasonable suspicion to stop appellant's vehicle and that the court of appeals applied an improper standard in determining whether the officers' suspicion was reasonable.

Good read here too:
http://www.fellowlawyers.com/index2.php ... f=1&id=819

The Police do not need probable cause to pull people over.