Update — Sept. 18, 7:45 p.m. ET
After a four-hour standoff with the police, the 33-year-old Grand Prairie resident was taken into custody. Police used tear gas to force him out of the vehicle.
Police in Grand Prairie, Texas, were in a standoff with a man who may or may not have been armed.
The standoff began Thursday afternoon when a traffic stop turned into a chase.
The man was in a parked car at the intersection of Pioneer Parkway and Great Southwest Parkway.
The man began anonymously live-updating on the secret-sharing app Whisper.
Law enforcement has not released the identity of the man inside the car.
The man used Whisper to take photos from inside his vehicle as well as posting status updates.
The reason for the initial traffic stop has not been released.
According to Slade Sohmer, Whisper's Head of News, they verified the authenticity of the posts using the app's opt-in geo-location.
"When we saw the stand-off in progress," Sohmer said. "We immediately checked all other tools at our disposal on the back end and then messaged the user for more information."
In a series of direct messages Whisper provided Gawker with the man in the vehicle said that he was first approached by police because he intimated that he was going to kill himself.
BuzzFeed News has contacted the Grand Prairie Police Department for comment.
Whisper has given BuzzFeed News photos they obtained via direct message from the man inside the car.
