DETROIT – It's happened at least twice in the last four days -- unsuspecting drivers rear-ended. Then when they get out to look at the damage, they're carjacked at gunpoint.

"These people are dangerous and all they want is your money and they want your car," said retired police Lt. Tom Berry.

The "bump and jack" has Berry saying, "Oh no, not again."

"It's been happening for 30 years in Detroit," he said. "It kind of comes and goes. (It's) usually a couple of groups. They know people won't stop on side streets, so usually it's a four-lane road or two-lane road. They want you to stop, want you to get out and let your guard. Once you do, up comes the gun. 'Get out of the car. Where your purse?'"

That's exactly what happen to a 26-year-old woman Sunday around 2 p.m. She was rear-ended at Grand River and Whitney. She got out to check the damages and found herself staring down the barrel of a gun.

The man robbed her and then took off in her Dodge Charger.

"Many times they're looking to use your car in a robbery, homicide, in a crime," Berry said.

Police reports show last Friday at 1:40 a.m. a 38-year-old man was driving on Strathmoor when he was bumped in the back. The two armed robbers didn't take his car, but they stole his wallet and jewelry worth more than $12,000.

So what should you do if someone rams into the back of you car?

"If you feel anything is wrong, do not stop," Berry said. "Get on the phone with 911 (and) drive to police station. You're not violating any law."

