Looking worn and defeated, a former Clackamas County sheriff's detective stepped to the front of a courtroom Thursday and pleaded guilty to two misdemeanors for failing to investigate reports of child abuse.

But the charges against Jeffrey Allen Green covered only a small slice of the more than 50 cases that investigators believe Green ignored during his six years as a detective. Green was assigned to an array of crimes in Wilsonville, including rape, the sexual assault of children and theft.

In some cases, Green didn't track down and identify suspects, submit DNA evidence from a rape kit to the state crime lab for analysis or make contact with victims or their families, prosecutors said.

Green closed cases with little or no work done, meaning some victims never saw justice and their attackers may still be walking free, said Deputy District Attorney Bryan Brock.

Defense attorney William Bruce Shepley offered the first public explanation for his client's lapses. He said Green, now 59, experienced health problems in the later years of his career and had a hard time emotionally coping with the horrific cases of abuse he saw.

"He suffered from a terrible case of burnout by the end of this," Shepley told Clackamas County Circuit Judge Michael Wetzel.

Green pleaded guilty to two counts of second-degree official misconduct.

The judge abided by the terms of a plea deal and sentenced Green to one year of probation, $1,100 in fines and fees and an order to relinquish his police certification so he can never work as an officer again.

Green won't serve a jail term. As outlined in the plea agreement, he turned himself into the Clackamas County Jail after his sentencing hearing. Staff took his fingerprints and his mugshot, then released him 33 minutes later.

It's the very jail that Green locked up the suspects he'd arrested during his 22-year career as a sheriff's detective. Now the tables have turned.

Wearing baggy blue jeans and an oversized black short-sleeve shirt, Green didn't make any statements before the judge in the courthouse where he'd testified for the prosecution so many times before. Green also declined to comment after the hearing.

Brock told the judge that he'd worked with Green on several cases and the DA's Office worked with him on a regular basis. He said Green was a "very experienced" detective and his mishandling of dozens cases wasn't due to a lack of intellect.

"I do know Detective Green, and I certainly know him to be a capable detective when he chose to be so," Brock said.

Chief Deputy District Attorney Chris Owen told The Oregonian/OregonLive that his office didn't perceive any potential conflicts of interest with handling Green's case. And given his retirement two years ago, Green isn't someone the DA's Office will work with again.

Brock wrote in a memo to the judge that Green's malfeasance came to light after sheriff's Sgt. Matt Swanson doggedly pursued the case. Days after being assigned to the Wilsonville office in February 2015, Swanson noticed problems with Green's work and began pushing his supervisors to take action.

Green retired in April 2015, but Swanson still pressed the Sheriff's Office to investigate Green. It took more than a year after Swanson first raised red flags for the Sheriff's Office to call upon an outside agency -- the Milwaukie Police Department -- to independently investigate Green in March 2016.

On Thursday, Brock said Green "had neglected his duties to a level I had not seen before."

Those strong words drew an audible gasp from Green's wife, who was sitting in the courtroom gallery. She put her hand on her forehead and began shaking her head back and forth.

"Ma'am," the judge said, in an effort to quiet her down.

"Sorry," she said.

Brock continued, saying that prosecutors charged Green with the only crimes it could: failing to investigate reports of child abuse that were sent to him by child welfare workers. State law required Green to initiate an investigation, and when he didn't he became guilty of second-degree official misconduct, Brock said.

The type of cases Green neglected, he said, were generally tougher cases, and it's questionable whether any of them would have netted convictions.

"They were challenging cases from the start," Brock said. "They were the ones that required a lot of extra work."

Shepley, Green's defense attorney, said he hopes the public focuses on Green's many accomplishments over his more than three-decades long career as a police officer and detective, rather than the criminal case against him focusing on the "twilight" of his career.

"In some respects, the county owes him a big debt," Shepley said.

Green now lives in La Grande. At the time he retired, he was making nearly $89,000 a year. He now draws an annual pension of $51,863 under the Oregon Public Employees Retirement System.

-- Aimee Green