"My buddy was like, 'He's texting and driving!' There he was, both hands on the phone and steering with his knee!"
So, when they hit a stoplight, this man who goes by "Chuck Bass" on Twitter snapped a photo of the Wichita police officer in the car next to him. Then he posted it on Twitter.
"Honestly, I thought it was a joke," he says. "I did not think Wichita Police would reply."
But within minutes, Wichita Police tweeted back, asking for the number of the police car in the picture.
Police say they are now investigating exactly what that officer was doing with his phone. Kansas law allows law enforcement officers to text and drive if it's work-related. That's the big question, and it's why social media consultant Cindy Kelly cringes at posts like this.
"Personally, I don't think it's cool to call poeple out publicly on social media, because you just don't know the circumstances," Kelly says.
Police Captain John Speer says citizens should indeed alert the department if they have concerns about police behavior. He says if the officer violated the texting law, he'll be disciplined.
Meanwhile, "Chuck Bass" says he's not looking for anybody to be fired, but he does want police held to the same standards as everybody else.
"If you think about all the things I do in my care that I might get pulled over for, why can't the officer be pulled over for the same thing?" he wonders.