A $412,500 lawsuit accuses a group of Portland police officers of getting drunk at a wedding and falsely confronting a female guest about stealing a wallet -- then tackling her, choking her and pulling down her strapless gown to expose her bare breasts.

Jessica Stradley's lawsuit accuses officers Patrick Mawdsley and Matthew Ginnow of taking part in an ugly confrontation and assault at the wedding in a home in Boring on Aug. 22, 2015. There were other officers involved, but they wouldn't give their names when asked by Stradley's husband, according to the lawsuit filed last week in Multnomah County Circuit Court.

Mawdsley, 42, and Ginnow, 38, declined comment for this story. They are both listed as defendants.

The suit also lists the city of Portland as a defendant, under the argument that the officers used their positions of power to wield influence over Stradley.

Police spokesman Sgt. Chris Burley declined comment, citing the pending litigation. He also declined to answer questions about the outcome of an internal investigation into the officers by the Police Bureau -- stating that the Bureau doesn't comment on administrative investigations, "whether the allegations were sustained or not."

Burley did confirm, however, that Mawdsley and Ginnow are still currently working as East Precinct officers.

The wedding was held on a late summer evening outdoors along a lakeside home in rural Clackamas County, according to a Clackamas County Sheriff's report into the encounter The gala was attended by 200 to 250 guests. The groom, Ryan Mele, was a Portland police officer, and many of the guests were sworn members of the force. Stradley and her husband aren't police officers, but were friends of the couple getting married.

The groom days later told a sheriff's detective how embarrassed he was at what unfolded and that the Sheriff's Office had to interview wedding guests, family members, the wedding photographers and servers.

The suit states that the confrontation happened after several hours of drinking by the officers. An officer saw a wallet belonging to Mawdsley's fiancee sticking out of Stradley's purse and accused Stradley of trying to steal it, according to the suit and the Sheriff's Office report.

Stradley, 35, said the wallet "had obviously been placed there by accident" and put the wallet on the table -- prompting Stradley's husband to tell a group of officers that it would be ridiculous for someone to try to steal at a wedding so heavily attended by police, according to the suit.

That's when the suit says Stradley and her husband were "immediately attacked" by the officers, including Mawdsley and Ginnow. The suit says one officer grabbed Stradley and shook her, and another knocked her off her feet from behind.

The suit states that an officer held Stradley down with his hand on her throat and put pressure onto her windpipe as he exclaimed, "I'm going to (expletive) kill you."

When Stradley got up, another officer pushed her down, causing her to cut her head as it struck a pole, according to the suit. She then tried to walk away, and one officer "pulled down on her strapless dress, exposing her down to her waist," the suit says.

Although the suit doesn't describe which officers did what, a Sheriff's Office report and a prosecutor's memo state that Mawdsley admitted to putting his hand on Stradley's throat and tearing down the front of her dress. But Mawdsley told a sheriff's detective that he was only responding to Stradley's pushes and swings and that the dress coming down happened in the process.

Mawdsley told investigators Stradley pushed him first, then he pushed her back, according to the Sheriff's Office report.

Stradley's attorney, Jason Kafoury, said neither Stradley or her husband punched or assaulted the police.

According to witnesses in the sheriff's report, Stradley's 6-year-old daughter saw the scuffle and went running onto the dance floor for help, exclaiming: "My mommy's getting hurt!"

The suit states that when Stradley told the off-duty officers that she was going to call the Clackamas County Sheriff's Office, one of them responded by saying, "Go ahead and call the (expletive) police. We are the police." One officer also said to Stradley's husband: "Go ahead and call Clackamas County. I'll tell them that your wife punched me in the face. Who do you think they're going to believe, you guys, or a bunch of cops?" according to the suit.

Two months after the wedding, Sheriff's Detective Mary Nunn forwarded a 44-page report to the Clackamas County District Attorney's Office. The detective recommended that all three people involved be prosecuted: Stradley for alleged theft and harassment, and Mawdsley and Ginnow for alleged assault.

The District Attorney's Office, however, declined to prosecute -- stating that conflicting accounts of what happened made it unlikely that the office would be able to prove any crimes took place beyond a reasonable doubt.

For one, a prosecution memo states that it couldn't be proven that Stradley stole the wallet. One possible scenario was that someone saw the wallet near her purse and put it in there, mistakenly thinking it had fallen out, the prosecution memo states.

As for Mawdsley, there wasn't enough proof that he pushed Stradley to the ground, and it's possible that Stradley had been drinking and tripped, the prosecutor's office concluded. The DA's office also found that Ginnow, the other officer, couldn't be positively identified as a person who pushed Stradley down.

It's unclear what came of the Portland Police Bureau's internal investigation into the actions of the officers, but Kafoury and the Sheriff's Office confirmed that there was an investigation. Kafoury said he has been unable to find out the results, but now will be able to because he's filed the lawsuit.

Kafoury described the case as "one of the most appalling off-duty police excessive force cases" that his firm has ever handled.

The suit seeks $7,500 in past medical expenses, $5,000 in future medical expenses and $400,000 for pain and humiliation. The suit claims that Stradley has suffered both psychological and physical symptoms, including short-term memory loss, headaches, a neck injury, bruises, a hurt left shoulder, headaches, sensitivity to light, nightmares and a fear of police.

Read the lawsuit here.

Mawdsley has 11 years with the Police Bureau, and Ginnow has seven years.

In 2012, the Police Bureau awarded Ginnow a Life Saving Medal for giving CPR to a woman who fell unconscious in front of him. Ginnow had found the woman sitting on a front porch, wrapped in a blanket, crying and depressed about her boyfriend's death a few weeks earlier.

Also in 2012, Mawdsley received a Police Medal from the Bureau for being part of a team of five officers who safely took a suicidal man into custody in 2011, after the man ran toward the officers with knives in his hands. Mawdsley fired bean bag rounds at the man, before another officer used a Taser on him. The man was placed on a mental-health hold, for possible long-term mental-health treatment.

In November 2016, Mawdsley and the groom at the 2015 wedding, Mele, faced criticism of excessive force after they pulled activist Kathryn Stevens off of her boyfriend, Portland's Resistance leader Gregory McKelvey, during a downtown Portland protest march. Stevens and McKelvey said the officers knocked them to the ground, put a pressure hold on Stevens' head and repeatedly hit her. Criminal charges against Stevens were dismissed a short while later, while McKelvey is still in the process of fighting a citation for allegedly failing to obey a police officer.

-- Aimee Green