That suspect is 51-year-old Scott Roeder from Merriam, in Northeast Kansas.
The Johnson County Sheriff's Office released his name Sunday evening, but he HAS NOT been formally charged.
Authorities pulled Roeder over three hours after the shooting. They say it appears he was driving home to Johnson County. He was not speeding or breaking any laws. Police say if it wasn't for the alert to watch out for the vehicle, they would have never noticed him.
Police say after he was pulled over, he didn't ask why.
"No, he didn't want to get away." Mike Pfannenstiel of the Johnson County Sheriff's Office said, "He was completely compliant with us. Followed all our orders."
Roeder has a criminal history. In 1996, he was sentenced to more than a year in prison for felony use of explosives and multiple license and vehicle violations. News of that conviction is posted on a website called "The Militia Watchdog". The site highlights anti-government criminal activity in the nation. Roeder's case was later appealed.
Look on Operation Rescue's anti-abortion website, and you'll find a posting by Scott Roeder. It's from two years ago and reads:
"BLESS EVERYONE FOR ATTENDING AND PRAYING IN MAY TO BRING JUSTICE TO TILLER AND THE CLOSING OF HIS DEATH CAMP. SOMETIME SOON, WOULD IT BE FEASIBLE TO ORGANIZE AS MANY PEOPLE AS POSSIBLE TO ATTEND TILLERS CHURCH (INSIDE, NOT JUST OUTSIDE) TO HAVE MUCH MORE OF A PRESENCE AND POSSIBLY ASK QUESTIONS OF THE PASTOR, DEACONS, ELDERS AND MEMBERS WHILE THERE? DOESN'T SEEM LIKE IT WOULD HURT ANYTHING BUT BRING MORE ATTENTION TO TILLER."
Police were at Roeder's home in Merriam on Sunday. Neighbors say they've noticed a lot of people coming and going from the house.
They describe Roeder as a quiet, religious man.
Authorities say, when they arrested Roeder, he did not have a gun on him. Wichita police will take possession of the car and search it for any weapons.