"It feels good that I got this straightened out at this time through the DNA," Johnson said in an interview in the lobby of a Cheyenne hotel. Tourists in town for the annual Frontier Days rodeo milled around him as he described how he had refused to quit challenging his conviction.
Johnson is the first person to be released under a recent state law that allows people to challenge old convictions using DNA evidence.
Johnson, who worked as a law clerk in prison, has been steadfast in maintaining his innocence. He drew repeated rebukes from judges for filing "frivolous" appeals on his own behalf as his conviction was upheld by both the Wyoming Supreme Court and the federal court system.
Johnson said that when he was first sent to prison, he told his mother he expected it would take him two years to get his conviction overturned. His mother died this spring. But he said she lived long enough to see that DNA testing had excluded him as the source of evidence in the case.
"My mother, that is a strong woman," Johnson said. "She held on until she knew that I was free."
Scott Homar, Laramie County district attorney, said Friday that he was dropping the charges after concluding that his office didn't have the evidence to convict Johnson.
Homar stated that, in the years since the 1989 rape, physical evidence in the case was destroyed and the lead detective in the case died. "This is not an exoneration," he said, claiming that there was other evidence that pointed to Johnson.
But Homar said he concluded his office would no longer be able to overcome its burden of proof if it went to trial against Johnson.
Johnson credited Homar with not opposing his DNA testing request. But Johnson said he is bitter that samples in his case weren't tested 24 years ago. "They were being cheap and didn't want to spend the money," he said of the state.
Lawyers with the Utah-based Rocky Mountain Innocence Center have pushed for more than a decade to free Johnson. The center succeeded in changing Wyoming law in 2008 to allow DNA testing, even years after a trial, with an eye toward pressing Johnson's innocence claims.
Jensie L. Anderson, legal director of the Rocky Mountain Innocence Center, said Friday that the center is thrilled about Homar's decision to drop the charges.
"The DNA we believe showed that Andrew was innocent, and this was the right thing to do," she said.
"The problem was, early on we recognized that there was DNA evidence that could be tested, but there was no way to get back into court," Anderson said.
Johnson said he intends to bring a civil lawsuit against the state. Another win for Rocky Mountain Innocence Center
Earlier this month, the Utah Supreme Court upheld the innocence of Debra Brown, who was once convicted of murder and represented on appeal by lawyers from the center. http://t.co/nYbWJemSA2