(CNN) -- The trial of a man who confessed to killing a Kansas doctor who performed late-term abortions began Friday, with the prosecution telling jurors they will hear from witnesses to the shooting. Jurors also learned they will hear the 911 calls made moments later. Roeder's murder trial began in Wichita, Kansas, on the 37th anniversary of Roe v. Wade, the Supreme Court decision that legalized abortion. Sedgwick County District Attorney Nola Foulston told jurors that among the trial evidence are blood-shattered shoes, shell casings and a calendar belonging to the defendant that had the day of the shooting circled.
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Dr. George Tiller was shot, killed while serving as an usher at Wichita church in May
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Scott Roeder says he justifiably killed Tiller in effort to save unborn children
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Tiller was one of four doctors in the U.S. who performed late-term abortions
With @placeholder's beliefs expected to be the focal point of his defense, the trial could become the next forum in the fierce national debate over abortion rights.