Aita Gurung sits at the defendant’s table during his murder trial in Chittenden County Superior criminal court in Burlington on Tuesday, Oct. 25. Photo by Glenn Russell/VTDigger

BURLINGTON โ€” A battle between mental health experts is playing out in the murder trial of a Burlington man accused of killing his wife with a meat cleaver five years ago.

The key question in front of the jury is not whether Aita Gurung killed his wife and seriously injured his mother-in-law, but whether he was insane at the time.

The defense over the past several days has presented a series of experts as they work to back up their opening statement that Gurung could not control himself during the attack and had sought psychiatric care in the days leading up to it.

On Tuesday, it was the prosecutorsโ€™ turn to put their expert on the witness stand to refute Gurungโ€™s insanity claim.

The case is now in its third week of testimony in Chittenden County Superior criminal court in Burlington, with the jury expected to begin deliberations later this week or early next week.

Gurung, 39, is charged with first-degree murder in the killing of his 32-year-old wife, Yogeswari Khadka, at their home in Burlington on Oct. 12, 2017. He is also charged with attempted murder, accused of severely injuring his mother-in-law, Thulsa Rimal, 54, in the same attack.

The prosecution Tuesday called on Dr. Catherine Lewis, a forensic psychiatrist and professor emeritus at the University of Connecticut. Lewis did not evaluate Gurung in person, but said she reviewed Gurungโ€™s medical records as well as other documents, photos and videos in the case.

โ€œIt is my opinion he appreciated the criminality of his conduct,โ€ Lewis told the jury under questioning from Assistant Attorney General Rose Kennedy.

Prosecutors have contended that Gurung had a history of assaulting his wife and abused alcohol. In their opening statement, they said Gurung was in a rage when the attack occurred because his wife wouldnโ€™t get him a beer.

Lewis said a video of the attack showing Aita Gurung speaking in English to a crowd of onlookers, rather than his first language of Nepali, was telling.

โ€œIn order for him to speak in English, he would have to recognize that the crowd, first of all, were people, and when someone is that psychotic they donโ€™t always even recognize they are dealing with people,โ€ Lewis said. โ€œHe would have to recognize they are English-speaking and process that information.โ€

Gurung then had to โ€œtranslate in his head from Nepali to English, โ€˜she betrayed me,โ€™ and then say that,โ€ Lewis said. โ€œAnd that actually is pretty complex higher process thinking, and in my opinion a person would not be able to do that in that psychotic of a state.โ€

Aita Gurung stands as the jury enters the courtroom in his murder trial. Nepali interpreters are translating the proceedings for Gurung through headphones. Photo by Glenn Russell/VTDigger

Also, when police arrived, Lewis said, it was clear Gurung did not want to be shot and he complied with their orders.

โ€œSomeone who doesnโ€™t care about the consequences will rush the police,โ€ Lewis said. โ€œBut he raised his arms. He did not want the police to shoot him.โ€

Lewis is expected to face cross-examination by Gurungโ€™s defense team when the trial resumes Wednesday morning.

Her testimony Tuesday came a day after Dr. David Rosemarin, a forensic psychiatrist called by Gurungโ€™s defense team, testified that Gurung had been compelled by โ€œvoicesโ€ to carry out the attack. Rosemarin said he had examined Gurung in December 2017, two months after the killing, and had done so again as recently as this summer.

Rosemarin said Gurung was โ€œso preoccupied with the voicesโ€ that he lacked the capacity to control his behavior.

โ€œHe was being controlled by the voices,โ€ Rosemarin testified. โ€œAnd at the time of killing, his free will was overwhelmed by the voices.โ€

Kennedy asked when the voices started.

โ€œAs (Gurung) describes it, the voices commanded it and he was going by the commands of the voices before the initial attack,โ€ Rosemarin said. โ€œExactly when? Don’t know. Before the first hit.โ€

Now heading toward a jury verdict, the case almost didnโ€™t make it to trial.

Gurungโ€™s was among three murder or attempted murder cases that Chittenden County Stateโ€™s Attorney Sarah George dismissed in June 2019. George said she based her decisions on expert opinions about the defendants, concluding that her office could not combat insanity defenses raised in each instance.

After Gov. Phil Scott called on then-Vermont Attorney General TJ Donovan to conduct a review of each case, Donovan brought the murder charge against Gurung two months later in September 2019.

Riley Robinson contributed reporting.

VTDigger's criminal justice reporter.