Then 40-year-old Hyun Ju Park was working as a bartender.
The lawsuit states that former HPD officer Sgt. Anson Kimura was at the bar drinking with friends, including two other off-duty officers.
Around 1:45 a.m., Kimura took out his 38-caliber revolver and was handling it recklessly. That's when he accidentally shot Park in the abdomen.
"My client has had her life ruined by this," said Eric Seitz, Park's attorney.
Seitz said Kimura had a history of alcohol abuse and emotional distress and that HPD failed to give him adequate treatment, support and counseling.
He said the officers with Kimura that night should also be held responsible.
"I think the police department bears responsibility if they know someone is impaired and knows somebody should not be entrusted with a weapon, they have a duty to the public to see to it that weapon is taken away," Seitz said.
Police sources said the revolver was Kimura's department approved, off-duty weapon and that he was known to pull out the gun when out with friends.
Seitz said the charges are an insult to his client.
"There was permanent damage to all her organs in her chest," he said. "She was in the hospital in intensive care for an extensive period of time and she's still under care. She can't stand, she has no energy, she is in pain and she will continue to be disabled for the rest of her life."
Hawaii News Now reached out to HPD but did not receive an immediate response.