Published: May 19, 2010 11:22 PM EDT

Charlotte County, Fla -  Real cop or fake cop?

The search is on in Charlotte County.

An 18 year old girl claims she was followed home and threatened by a man, who appeared to be impersonating an officer.

The high school senior was too terrified to speak to WINK News, so she had her grandmother speak for her.

Madie Kirkland tells us what happened Tuesday afternoon.

"He followed her and pulled up behind her," Kirkland said

The teen was driving behind a white or cream colored Ford Expedition.

She said it was driving very slow.

Suspiciously slow.

So the teen passed it.

It then follows her every turn.

She wasn't doing anything illegal so there was no reason for a police officer to follow her.

Scared, the girl drives to her grandmother house nearby.

That's when the the so called cop went into action.

"He was screaming at her saying, "I have your tag number. I know where you live. You're going to get a letter." He was holding up a badge," said Kirkland.

He then drove off without ever identifying himself.

What scares the teen and her family is that this isn't normal cop behavior, leading them to believe he was a fake.

The Charlotte County Sheriff's Office is also concerned.

A spokesman for the agency says a similar incident was reported several weeks ago.

The last one was in the Deep Creek area.

There's not much information from that incident.

In Tuesday's incident though, the man is described as white, middle aged, balding, with a moustache.

The white or cream colored Ford Expedition was not a marked patrol car.

The girl never got a license plate number, which complicates the investigation.

"The investigation will continue if we have more information and that's what we don't have. We're at a dead end right now," said Bob Carpenter, a spokesman for the Charlotte County Sheriff's Office.

Anyone with information is asked to call the Charlotte County Sheriff's Office.

Meanwhile, the sheriff's office is giving out safety tips.

This way you know what to do if you're ever in a situation where you're being pulled over by an unmarked car.

Pull over in a well lit area.

One that's heavily populated

If you can't do either of the above, call 911 and verify it's a real officer pulling you over.