Jury selection begins Thursday in the highly emotional trial for the wife of the gunman who shot and killed 49 people at a Florida nightclub in 2016.
Noor Salman is charged with aiding and abetting her husband, Omar Mateen, in preparation for his attack on Pulse Nightclub and obstruction of justice.
Salman has denied any involvement or prior knowledge in her late husband's premeditated plans, but later confessed to scouting out the club with him prior to the attack and accompanying him when buying ammo.
After the attack, she told the New York Times that Mateen was abusive.
Prosecutors say her lawyers may claim she feared for her safety and the safety of her child.
Salman is the only person being charged in the case since Mateen died during a shootout with police.
Her trial is expected to last a month. If convicted she faces life in prison.