A woman, meantime, was taken to the hospital but is expected to survive her injuries.
PHOTOS: Police investigate deadly wreck on Westheimer Pkwy
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Just before midnight, officers found the vehicle tipped over in a grassy embankment right off Westheimer Parkway at S. Barker Cypress, near the West Oaks Mall.
Houston police says a man was found dead at the scene, but wasn't sure whether he was the driver or a passenger.
RAW VIDEO: Man killed in crash near West Oaks Mall
The woman who was in the car was transported with non-life threatening injuries.
Investigators said it appears the car rolled several times before stopping just off the shoulder of the roadway.
The cause of the accident is not yet known.
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