Jury selection will begin Thursday in the federal trial against Noor Salman, the widow of Pulse nightclub shooter Omar Mateen.

Prosecutors contend that Salman knowingly helped her husband plan the attack that killed 49 people and injured 53 others.

Mateen was killed in a shootout with police after carrying out the attack on the popular gay nightclub on June 12, 2016.

The charges carry a maximum life sentence if convicted.

U.S. attorneys plan to present evidence that they argue will prove Noor Salman knew her husband planned to carry out an attack at Pulse nightclub.

That evidence, court records show, include videos from inside Pulse, police body cameras, 911 phone calls, and phone calls and texts Mateen shared with relatives, including Salman.

During a phone call with police, while the attack unfolded, Mateen professed his allegiance to ISIS.

Prosecutors say Salman provided differing statements to the FBI about what she knew. They contend Salman accompanied Mateen as he scoped out potential targets, including Pulse and areas at Walt Disney World.

“This community is going to learn a lot of information during the course of the trial that simply hasn’t been public yet,” said attorney David Haas.

Hass is not involved in Salman trial but is a current criminal defense attorney. He has spent 17 years in law, including as a former U.S. Attorney prosecutor and Florida State Attorney.

“Even though this case has been through scrutiny and review, you’re still going to learn a lot of details of what the government did, which will be impressive in volume and specificity,” he said.

The crux of the case will come down to one central question: Did Noor Salman help her husband carry out the attack at Pulse nightclub?

“The prosecution is going to take two avenues to show that she knew and intentionally helped her now deceased husband — that she helped him by casing out locations all across Central Florida,” Haas said. “They also have to prove that she knowingly and intentionally agreed to help him.”

Salman is represented by Charles Swift. He has spent part of his career as an attorney in the Navy, representing inmates at Guantanamo Bay, Cuba, and is currently Director of Constitutional Law Center for Muslims in America.

In court documents, Swift argues Salman was not aware of her husband’s plot to carry out and attack, and further argues that Salman is a victim of abuse.

“It goes to whether she voluntarily and knowingly participated,” Haas said. “The Defense is going to say it wasn’t a lie, that is where she believed he was going that night, and the abuse and all of that sort is him (Mateen) manipulating her, and not her assisting him.”

The trial is expected to last nearly two months. Salman’s fate will ultimately be in the hands of 12 jurors, selected from a roster of registered voters from Central Florida region.