There is no dispute that Robert Hall was involved in the fatal shooting of Boise attorney Emmett Corrigan on March 11, 2011.

There is no dispute that the only eyewitness was Kandi Hall — Robert Hall’s wife — who was with Corrigan that night and saw much of the confrontation between the two men.

What an Ada County jury will have to decide is whether the 42-year-old Hall shot and killed Corrigan with premeditation and purpose that night in Meridian because he suspected that Corrigan and his wife were having an affair.

After more than a year of legal wrangling and numerous twists and turns — including Kandi Hall facing prison time after pleading guilty to an unrelated charge of grand theft and Robert Hall posting a $1 million bond to get out of jail after his arrest — the case is finally going to trial.

Robert Hall is charged with first-degree murder and using a weapon in commission of a crime. Jury selection will begin at 9 a.m. Tuesday, and opening arguments are set to begin Wednesday. The trial is expected to last for about a month.

Prosecutors declined to pursue the death penalty, so Hall faces up to life in prison if convicted of the murder charge.

JEALOUSY OR ACCIDENT?

Police and prosecutors say their theory of the case is simple: Hall killed the 30-year-old Corrigan to prevent Kandi Hall from leaving him.

Prosecutors say they will present testimony from Kandi Hall’s family and friends that her marriage to Robert was in trouble and that she was considering divorce, according to court documents obtained by the Idaho Statesman.

Those same documents shed some light on what Hall’s defense likely will be — although many records that explain the evidence both sides will present have been sealed because of concerns about pretrial publicity.

Hall told Meridian police that he wasn’t sure how Corrigan was shot and that his gun fell during a struggle with the lawyer.

Hall’s attorneys are expected to call an expert witness who will testify that Corrigan was under the influence of steroids and amphetamines, drugs that caused “negative psychiatric effects” when he confronted Hall in the parking lot.

Meridian police say it appears that Hall tried to shoot himself in the head after he shot Corrigan but missed, suffering a superficial wound. Hall is left-handed and the wound was to the left and rear of his head, according to court testimony.

Hall’s attorneys are expected to call an expert to testify that Hall has “retrograde amnesia” as a result of that wound and does not remember what happened.

Police have said that Hall suspected his wife was having an affair, and court documents indicate that Hall’s lawyers might put on some testimony that an affair did occur — including plans to enter a sample of Corrigan’s semen into evidence.

THE SHOOTING

According to court records, Hall called Kandi Hall the night of March 11 when he found out that his wife and Corrigan met at the Linder Road Walgreens.

Prosecutors say that Hall spoke to his wife and Corrigan on the phone, and when Kandi Hall said they were on the way back to the Walgreens, Hall grabbed a .380-caliber semiautomatic handgun, drove to the store around 10 p.m. and waited for the two.

Police say Kandi Hall told them that Corrigan and Hall got out of their cars and began to argue, with Corrigan being more verbally aggressive than Hall, according to court records.

Kandi Hall told police that she turned her back and heard three shots almost immediately.

When she turned around, both men were on the ground. Her husband started to get up and she kicked or threw the gun across the parking lot, according to court records.

Police arrived at 10:20 p.m. and found Corrigan near his pickup truck with the driver's door open. He was declared dead at the scene.

Police arrested Hall on March 13 after he was released from the hospital.

Patrick Orr: 377-6219, Twitter: @IDS_Orr