A protester shot Tiller in both arms in 1993, and his clinic was bombed in 1985. More recently, Monnat said Tiller had asked federal 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.
In early May, Tiller had asked the FBI to investigate vandalism at his clinic, including cut wires to surveillance cameras and damage to the roof that sent rainwater pouring into the building.
Anti-abortion groups denounced the shooting and stressed that they support only nonviolent protest. The movement’s leaders fear the killing could create a backlash just as they are scrutinizing U.S. Supreme Court nominee Sonia Sotomayor, whose views on abortion rights are not publicly known.
"We are shocked at this morning’s disturbing news that Mr. Tiller was gunned down," Troy Newman, Operation Rescue’s president, said in a statement. "Operation Rescue has worked for years through peaceful, legal means, and through the proper channels to see him brought to justice. We denounce vigilantism and the cowardly act that took place this morning."
In 1991, the Summer of Mercy protests organized by Operation Rescue drew thousands of anti-abortion activists to this city for demonstrations marked by civil disobedience and mass arrests.
Tiller began providing abortion services in 1973. He acknowledged abortion was as socially divisive as slavery or prohibition but said the issue was about giving women a choice when dealing with technology that can diagnose severe fetal abnormalities before a baby is born.
After the 1991 protests, Tiller kept mostly to his heavily guarded clinic, although in 1997 he opened it to three tours by state lawmakers and the media.
Tiller remained prominent in the news, in part because of an investigation started begun by former Kansas Attorney General Phill Kline, an abortion opponent.
Prosecutors had alleged that Tiller had gotten second opinions from a doctor who was essentially an employee of his, not independent as state law requires. A jury in March acquitted Tiller of all 19 misdemeanor counts.
"I am stunned by this lawless and violent act, which must be condemned and should be met with the full force of law," Kline said in a written statement. "We join in lifting prayer that God’s grace and presence rest with Dr. Tiller’s family and friends."
Abortion opponents also questioned then-Gov. Kathleen Sebelius’ ties to Tiller before the Senate confirmed her this year as U.S. Health and Human Services Secretary. Tiller donated thousands of dollars to Sebelius over the years.