A retired Pennsylvania pastor insists both of his wives died accidentally. Prosecutors call him a liar - and a killer. Already facing trial in the death of his second wife, Arthur Burton "A.B." Schirmer is now charged with killing his first wife, too, after a grand jury concluded her injuries weren't consistent with a fall down the stairs, prosecutors announced Friday. Lebanon County District Attorney David Arnold declined to discuss a motive, but a grand jury report said that Schirmer, 64, had been unfaithful to his first wife, Jewel Schirmer, throughout their 31-year marriage. Court documents also said the couple had financial difficulties. Jewel Schirmer, 50, died at Hershey Medical Center of a traumatic brain injury from a supposed fall. Prosecutors in that case say Schirmer killed his second wife, then staged a car accident to cover it up. He faces trial in January. Jewel Schirmer's family, who had long suspected foul play, welcomed the decision to charge the retired pastor in her death. "I've been waiting 13 years for this day to come," said Jewel's brother, Jonathan Behney, appearing at a news conference Friday with Arnold. It's time for justice. 13, 2012 photo, The Rev. Arthur Burton Schirmer, 62, right, is led into district court by Pennsylvania State Trooper Bill Skotleski in Tannersville, Pa. Schirmer is accused of killing his wife and staging a car accident in July 2008 to cover up the murder. On Friday, Sept. 28, 2012 he was charged in the death of his first wife, Jewel, in 1999. (AP Photo/Pocono Record, David Kidwell) MANDATORY CREDIT Close The district attorney said he did not believe the initial 1999 investigation was botched, though he added no probe is completely free of mistakes. Looking back today on what they knew at the time, I wouldn't feel comfortable criticizing the people who worked on it. I don't think it would be fair to them," he said. We have different technologies available now that they didn't have then. Technology that would help break the case. Schirmer has long claimed he was out for a run on April 23, 1999, when he returned home to find his first wife's body in a pool of blood at the bottom of the basement steps. Jewel suffered a fractured skull as well as injuries to her face, body, arms and legs, according to a police affidavit. But the coroner made no determination at that time as to whether her death was an accident or a homicide, and the original investigation was closed after a cardiologist who evaluated her heart for transplant concluded she had also suffered a heart attack. Taking a fresh look at the case, investigators hired a biomechanical engineering firm to recreate Jewel Schirmer's supposed fall down the stairs. The firm used a test dummy fitted with various instruments to collect data on the forces to which her tumbling body would have been subjected. "We found the 'crash dummy' evidence to be particularly compelling, as it indicated to us that Jewel could not have suffered all of her injuries by accidentally falling down a flight of stairs," the grand jury wrote. Another cardiologist, meanwhile, reviewed Jewel's medical records and concluded she had not suffered a heart attack, after all. The grand jury cited medical testimony that revealed Schirmer likely used blunt objects to kill both his wives. To the contrary, we believe probable cause exists to believe that neither woman died from an accident," the report said.