George Tiller

WICHITA, Kan. — A man suspected of shooting and killing a well-known doctor who performed late-term abortions was in jail today while investigators sought to learn more about his background, including the extent of his connections to anti-abortion groups.

Dr. George Tiller, 67, was serving as an usher during morning services Sunday when he was shot in the foyer of Reformation Lutheran Church, police said. The gunman fired one shot at Tiller and threatened two other people who tried to stop him.

The suspect, identified by one law enforcement agency as Scott Roeder, was taken into custody some 170 miles away in a Kansas City suburb about three hours after the shooting.

Roeder, 51, was returned to Wichita and was being held without bond on one count of first-degree murder and two counts of aggravated assault. Formal charges were expected to be filed today.

A man with the same name as the suspect has a criminal record and a background of anti-abortion postings on sympathetic Web sites. In one post written in 2007 on the Web site for Operation Rescue, a group that closely followed Tiller's work and legal troubles in recent years, a man identifying himself as Scott Roeder asked if anyone had thought of attending Tiller's church to ask the doctor and other worshippers about his work.

But police said Sunday that all early indications showed the shooter acted alone. Operation Rescue condemned the killing as vigilantism and "a cowardly act." The president of the group told The New York Times that Roeder was "not a friend, not a contributor, not a volunteer."

In 1996, a 38-year-old man named Scott Roeder was charged in Topeka with criminal use of explosives for having bomb components in his car trunk and sentenced to 24 months of probation. However, his conviction was overturned on appeal the next year after a higher court said evidence against Roeder was seized by law enforcement officers during an illegal search of his car.

At the time, police said the FBI had identified Roeder as a member of the anti-government Freemen group, an organization that kept the FBI at bay in Jordan, Mont., for almost three months in 1995-96. Authorities on Sunday night would not immediately confirm if their suspect was the same man.

In May 2007, someone posting to the Web site of the anti-abortion group Operation Rescue used the name "Scott Roeder" in response to a scheduled vigil to "pray for an end to George R. Tiller's late-term abortion business."

The slaying brought condemnation from both anti-abortion and pro-choice groups, as well as President Barack Obama.

"However profound our differences as Americans over difficult issues such as abortion, they cannot be resolved by heinous acts of violence," Obama said in a statement.

The women's clinic run by Tiller is one of three in the nation where abortions are performed after the 21st week of pregnancy, when the fetus is considered viable, and has repeatedly been the site of protests for about two decades. A protester shot Tiller in both arms in 1993, and his clinic was bombed in 1985.

Wichita Deputy Police Chief Tom Stolz said that Tiller apparently did not have a bodyguard with him in church, although the doctor was routinely accompanied by one. An attorney for Tiller, Dan Monnat, said the doctor's wife, Jeanne, was in the choir at the time of the shooting.

Monnat said in early May that Tiller asked prosecutors to step up investigations of vandalism and other threats against the clinic out of fear that the incidents were increasing and that Tiller's safety was in jeopardy. However, Stolz said authorities knew of no threats connected to the shooting.