He didn't have a badge or uniform, but he did have an unlicensed gun and a police-style baton.
"He was kind of uneasy, going in and out of his car," Boateng told Fox25Boston.
She said he never told her he was a police office, but she just assumed he was.
"When this man came, he said he's going to help us. 'Oh, he might be an off duty cop. He just wants to help us,'" Boateng said.
But when Tyngsborough police showed up, they immediately knew something was off. They questioned Lessard and found an unlicensed gun, a baton and bullets on him.
"(It) was very scary. We're just lucky that somebody happened to be passing by," Boateng's daughter, Fatima Thollie, said.
She was also in the car at the time.
Both women said they're thankful the police showed up when they did.
Lessard appeared in court Monday, charged with impersonating a police officer, carrying an unregistered firearm without a license, and other felony weapons violations.