Casey went through the phone's contents and looked up Rankin's identification on the computer in his patrol vehicle, the suit says.

“You’re out here trying to record us and trying to act like you know the laws,” Casey said.

Rankin twice asked Casey if he was being detained, to which Casey responded, "You don't get to ask questions."

Casey also accused Rankin of interfering with the traffic stop by recording it, claiming he saw a red light flash several times and didn't know if the light came from a weapon or other device.

"I don’t know you, I don’t know what you're doing over here," he said.

Casey handed Rankin's phone back to him and threatened to arrest him if he started recording again.

“If you start recording us again and interfering with my stop, I’m going to come over here and I’m going to seize your phone and I’m going to arrest you for interfering once again with my stop," he said.

Officials with the City of Pevely did not immediately respond Tuesday to requests for comment.