Wayne Breen, the doctor who was shot dead by his wife, Kacie, in the couple’s Folsom-area home on March 1, had been faking the symptoms of Vietnam-related trauma in order to deceive his wife, his therapist and women he seduced, his wife alleged in court documents filed Wednesday.

The documents, filed in connection with a wrongful-death suit brought against Kacie Breen by her late husband’s children with his first wife, allege that Wayne Breen’s stories were extensive and long-running, and that their unraveling drove him to ever more abusive behavior.

It was the second filing in which Kacie Breen’s attorney, Richard Ducote, has argued that her husband’s anger the night of the shooting was set off by the possibility that his war stories were coming under suspicion. In fact, Wayne Breen had never been in Vietnam or served in combat, Ducote alleges.

Kacie Breen said she shot her husband after the two argued and she feared for her life.

She has not been arrested, but an investigation by the St. Tammany Parish Sheriff’s Office is ongoing. Detectives are awaiting DNA test results and phone records, a spokesman said Wednesday. Kacie Breen has fully cooperated with the investigation, the spokesman said.

Wayne Breen’s angry outbursts stretched back nearly a decade, according to Ducote’s filing. In 2006, it says, he was ordered to seek therapy by the management of St. Tammany Parish Hospital for “disruptive conduct” and “abusive and derogatory behavior toward the nursing staff.”

An email and a call to a hospital spokeswoman were not returned Wednesday afternoon.

Wayne Breen told his therapist, Dr. Leanne Truehart, “long, elaborate, detailed stories about his traumatic combat experiences in Vietnam,” blaming the experiences for his emotional problems and at one point entrusting her with a gun he called his “Vietnam combat” weapon, ostensibly so that he couldn’t use it to commit suicide, Ducote wrote.

The filing says that Truehart also was shocked to learn in 2012 that Breen was married to Kacie and that the pair had a young son; Breen had never talked about them in six years of therapy, the documents say.

Breen also told stories about Vietnam to women with whom he had affairs, Ducote alleges. Kacie Breen discovered an audio recording Breen made that shows that he used the Vietnam “tales as psychological foreplay and pillow talk” during an affair with another woman, according to Ducote’s filing.

The allegations came in a motion to disqualify two attorneys — Frank Tranchina and Mark Mansfield — from representing Wayne Breen’s son Sean in the wrongful-death suit against Kacie Breen. Tranchina and Mansfield represented Wayne Breen in an earlier matter, and Ducote argues that they may be called to testify.

Reached by phone, Mansfield dismissed the claims as “nonsense” and said he and Tranchina would respond at “an appropriate time.”

Mansfield and Tranchina will be in court Thursday as part of the legal team representing Breen’s grown children during a hearing on a different lawsuit, this one over the disposition of Wayne Breen’s estate. The motion before the court contests a will filed by Kacie Breen earlier this month.

The motion is one of several before 22nd Judicial District Judge Scott Gardner, but at least one issue appears settled: Ducote filed a motion earlier this week agreeing with a request from Breen children that an independent, third-party administrator be appointed for the estate.

The question of who has control of which assets has been in dispute since Wayne Breen’s death. In May, Gardner appointed Wayne Breen’s son-in-law, Jeff Dunbar, and Kacie Breen as co-administrators, partially because no original copy of the will had been found.

Since then, however, Kacie Breen has located an original copy of the will, which appointed her sole administrator of the estate. The Breen children are contesting that will.

At least one alleged witness to the will, Lakeitha Cole, has submitted an affidavit saying she did not see Breen sign it. Cole could be called to testify Thursday.

Ducote said Thursday that he expects the hearing to show that the will was executed properly.

Follow Faimon A. Roberts III on Twitter, @faimon.