It was almost 2 a.m. on US 83 in Rio Grande City. A trooper's radar clocked a driver at 37 miles per hour in a 30 zone.

By the end of the stop, the driver was under arrest for DWI, according to a sworn complaint.

The driver is Dianira Navarro. She is charged with driving while intoxicated. The complaint lists it as a Class B misdemeanor. That can mean up to 180 days in jail.

These are claims in a complaint. They have not been proved in court.

Trooper Juan Espinosa signed the complaint. It is dated Aug. 24, 2026. Here is what he wrote.

At about 1:53 a.m. on Monday, Aug. 24, Espinosa was sitting still on US 83 in Rio Grande City. He was facing west.

He saw a vehicle heading east. He wrote that it seemed to be going faster than the posted speed limit of 30 mph. He turned on his radar. It showed 37 mph.

The vehicle drove past him. Espinosa turned around. He switched on his red and blue lights. The driver stopped a short time later.

The trooper walked up and talked to the driver. He wrote that he could smell alcohol.

He asked Navarro if she had been drinking. The complaint says she told him she had 2 beers.

Espinosa asked her to do field sobriety tests. These are the roadside tests, like walking a line or following an object with your eyes. She agreed to do them.

The trooper wrote that he saw "multiple clues" during the tests. He wrote that he believed she had lost the normal use of her body and mind needed to drive safely.

Navarro was arrested and placed in his unit.

Next came the breath test. Navarro got an audio reading of a form called the DIC-24, the complaint says. It is a state warning that asks a driver for a breath or blood sample. It also explains what happens if the driver says no.

The complaint says Navarro agreed. She was taken to the Starr County Jail. There she blew into a machine called the Intoxilyzer 9000.

The machine showed two results: 0.098 and 0.101.

In Texas, a driver at 0.08 or more is legally intoxicated. A driver can also be charged with no test number at all. That happens if police say the driver lost normal use of body or mind.

Navarro was booked and handed over to Starr County Jail staff, the trooper wrote. He said it happened "without incident."

The complaint is a short, one-page form. It does not say what kind of vehicle she was driving. It does not say if anyone else was with her. It does not say if she has bonded out. It does not list a bond or a court date. The spots for the official who swore him in and for a judge are blank on this copy.

A breath test result and a roadside test are evidence. They are not a conviction. A defense lawyer can question how the tests were done and if the machine was working right. A judge or jury makes the final call.

Everyone is presumed innocent until proved otherwise.