As authorities in Mississippi investigate whether two people shot dead beside separate sections of highway were victims of a gunman posing as a police officer, a woman who escaped a suspected fake cop in April has been re-interviewed in hopes she can help find the killer.

The April incident occurred in northwest Mississippi, near where Lori Anne Carswell, 47, and 74-year-old Thomas Schlender were shot and killed beside Highway 713 and the I-55 earlier this month.

Tate County Sheriff Brad Lance said the woman, who has not been named, was pulled over on the I-55 -- the same road where Schlender was killed -- last month by a man who appeared to be impersonating an officer, MyFoxMemphis reported.

"The headlights were alternating like wig-wags type flashers and there was a white flashing light on the dashboard. She was adamant there were no blue lights," Lance said.

"She just did not feel comfortable, she did not roll the window down, she cracked it to talk to him. He asked for her driver's license, told her she was speeding."

The woman replied that her license was in the trunk in her purse and that she would not get out of her car. When the man became agitated, she asked for his ID. He hit her car with his hand and told her to drive away.

"She told police the suspect was driving a gold sedan ... was in his 40s, wearing an untucked plaid shirt and tan pants," Lance said. "When she asked why he wasn't in uniform, he said it was his day off."

He added, "We simply don't know if they're related to these shooting incidents or not."

Law enforcement agencies are working together to find out who killed Carswell and Schlender.

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