But the state's forensics expert, Steven Nicklin, acknowledged that there was "not enough detail agreement ... to conclusively link these bullets to this weapon."
Nicklin testified that he also requested Robertson's gun for testing, but it was not provided. Nor was an identical gun owned by an employee of the two farmers.
Gene Thomeczek, a retired FBI agent hired by Woodworth's family after his second conviction, found that more than 200 people in Livingston County owned the same model of Ruger gun.
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Among 10,000-plus pages of trial transcripts, investigative reports and other documents reviewed by the AP were tips from five people who reported unfamiliar cars or suspicious drivers in the area hours before the crime.
A confirmed car — especially one in the driveway, as reported by one witness, who later said he could have been mistaken — would have presented "a completely different scenario," said Gary Calvert, who as Livingston County chief deputy took charge of the investigation when the major-case squad left and who was later elected sheriff.
"We spent years trying to put a suspect with a vehicle with a weapon," he said. "And no pieces would fall together."
Private investigator Terry Deister, hired by Lyndel Robertson after the initial investigation stalled, helped persuade Calvert to focus on the soft-spoken neighbor.
The two investigators visited the Woodworth home on July 4, 1992, knowing Mark's parents weren't home. They came to discuss a vandalized combine owned by Lyndel Robertson. A four-hour interrogation then and a second session on Easter Sunday 1993 would prove pivotal to the prosecution's case.
The teenager used profanity to describe his father's former partner. Although by most accounts the 16-year partnership was thriving before the shooting, the fractured business relationship was cited as a motive. With his partner's death, Woodworth's father could cash in a $100,000 life insurance policy each man carried.
No evidence was presented in the two trials showing that Mark Woodworth knew about the insurance policy.
Another suggested motive: Robertson and his wife reportedly complained about the business having to pay Mark Woodworth $6,000 to harvest his own soybeans. Robertson, though, never mentioned such concerns until years after his wife's death. And when he faced unpaid medical bills after the shooting, Mark Woodworth gave his neighbor several thousand dollars to help out.
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A grand jury indicted Mark Woodworth in October 1993. Just five days before it was impaneled, Livingston County prosecutor Doug Roberts asked a judge to release him from the case. Now in private practice, Roberts declined comment on this decision.
But in an Oct. 5, 1993, letter to Circuit Judge Kenneth Lewis, the prosecutor noted that Lyndel Robertson asked he be disqualified for a "lack of enthusiasm." Roberts reminded the judge that soon after the crime, Robertson "was adamant that we charge another young man" — Thomure.
In a letter to the state Attorney General's Office asking for a replacement prosecutor, the judge wrote of Roberts: "He boycotted the grand jury proceedings this morning, which is simply unheard of in my experience."
"The prosecutor up there never really believed in Mark's guilt," said Phil Thompson, the retired state trooper who worked as Woodworth attorney Wyrsch's investigator. "He never felt there was enough evidence to warrant charges. That's why Kenny came up."
Kenny was Kenny Hulshof, a special prosecutor who crisscrossed Missouri assisting overmatched small-town prosecutors in high-profile cases. Hulshof went on to serve six terms in Congress and won the 2008 Republican nomination for governor before losing in the general election.
His career as a prosecutor was marked by a pattern of appeals court rulings that questioned his courtroom behavior. In February, a Cole County judge cited prosecutorial misconduct by Hulshof in the trial of Joshua Kezer, who was convicted as a teen of killing a college student. The ruling led to Kezer's release.
Asked about the Woodworth trial, Hulshof cited the verdicts by two juries "who considered the evidence and dispassionately applied the law."
But three jurors in Woodworth's second trial said it was not so clear cut.
"I just didn't think they showed us enough evidence," said juror Lisa Routh. "I'm not saying he didn't do it. There just wasn't enough evidence to say he was guilty."
Routh and two other jurors interviewed by The Associated Press said they were pressured by the other panel members to convict Woodworth — partly out of a desire to go home after the weeklong trial.
"They felt like we just wouldn't be able to get out of there if we didn't agree," said juror Dorothy Witt. "They just wanted us to all agree to the facts so they could leave."
After the verdict, Routh and Witt approached Livingston County Circuit Judge Stephen Griffin to discuss their concerns. The judge rebuffed the two women and issued a gag order preventing them from speaking with the prosecutor and the defense. Griffin did not respond to AP interview requests.
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For inmate No. 514406, life at the maximum-security Crossroads Correctional Center in Cameron is defined by routine. He works at the prison welding shop, earning $1.50 a day to help buy telephone calling cards or canteen goods.
Housed in a unit for offenders who demonstrated good behavior, Woodworth follows the hometown Kansas City Chiefs and Royals on ESPN or reads his Bible. His parents visit most weekends.
Except for two years free after his first conviction was overturned, Woodworth has spent his entire adult life behind bars.
Earlier this year, the state parole board denied his request for an early release.
"There were some holes in the case," acknowledged Robert Robinson, a recently retired parole board member. "But it wasn't enough to persuade anyone to feel contrary to what the two juries decided."
Woodworth hasn't exhausted his appeals. He says he takes comfort from the support of friends in Chillicothe, 30 miles away: "They're the ones that have given me hope."
And Woodworth, who turns 35 later this month, doesn't waver from earlier claims of innocence.
"I didn't kill them. I had no reason to," he said.
http://news.yahoo.com/s/ap/20090802/...rine_robertson