The women were leaving the casino when a gunman forced them into their car.
Police said the man was driving a Mustang when the gunmen demanded the 31-year-old get out of the car.
The symbol of Detroit’s industrial decline attracted 111 bids from around the world.
The carjacking is just the latest attack at what has become a lawless wasteland on Detroit’s east side.
“You gonna see him because he’s the only one walking up Harper,” the caller said.
Police swarmed downtown Detroit with guns drawn, searching for a man who fled in a sheriff’s deputy uniform.
Detroit police routinely send out indecipherable photos of “wanted” violent criminals, despite having access to crisp images.