LAPORTE COUNTY | A man apparently posing as a police officer stopped a woman on U.S. 421 in LaPorte County, but the woman fled after she said she felt something wasn't right.

"He was up to no good. No doubt about it. She did the right thing by leaving," LaPorte County Sheriff Mike Mollenhauer said.

The woman told a sheriff's deputy that she was traveling southbound on U.S. 421 from U.S. 30 about 8 p.m. Thursday when she noticed the high beam headlights on a car traveling behind her started flashing. The woman told police she then saw a blue flashing light on the inside of the car turned on.

After the woman pulled over about a mile south of Wanatah, the car stopped behind her and a man got out, police said.

As the man approached, the woman told investigators she was already suspicious. And when she didn't see anything that would identify him as a police officer, the woman sped off.

The only description of the man was he was white and wore dark clothing, police said.

Mollenhauer said police officers have red and blue lights sometimes with white mixed in.

He said volunteer firefighters use blue lights and if a volunteer firefighter was involved in this case, the vehicle would have passed.

Mollenhauer also said officers in unmarked vehicles must be in uniform to pull somebody over with proper identification.

"I really believe this was somebody who was up to no good," Mollenhauer said.