During a custody exchange of their adult son, Michael Viana, 57, invited his wife, Lynn Marie Viana, into his home, the New Hampshire attorney general’s office said in a statement.
Shortly after, two noises consistent with gunshots were heard from inside. The home then became engulfed in fire, the statement said. The presence of ignitable liquids was detected on or near Viana’s body.
Michael Viana was rescued from the home and is receiving medical treatment for life-threatening injuries, including burns and head trauma, at a hospital in Boston.
Prosecutors said they plan to charge him with first degree murder if he recovers from his injuries.