Genesse Ivonne Moreno, a man “living as a woman,” opened fire on an outdoor Christian congregation gathered for a Spanish-language prayer service at Lakewood Church in Houston, Texas, Sunday. Media reported he had a pro-Palestinian slogan, “Free Palestine,” on the gun he used. Lakewood Church is a so-called mega-church located in a former sports stadium and is one of the largest churches in the United States.

“KHOU and the Houston Chronicle are reporting Moreno, who previously identified as Jeffery Escalante, had an extensive criminal history dating back to 2005, according to a Texas Department of Public Safety records search,” reported the Washington Blade, a gay publication.

Detectives estimate Moreno might have fired as many as 12 rounds during the incident which unfolded in the Lakewood Church Sunday afternoon. The shooter’s weapon was an AR-15, according to CNN and ABC News.

Houston Police Chief Troy Finner disclosed that Moreno entered the church with a young child and he was dressed in a trench coat. An exchange of gunfire ensued when Moreno initiated the attack. Two off-duty law enforcement officers, present at the scene, responded with lethal force, killing Moreno. Officials Monday afternoon said the boy was Moreno’s 7-year-old son. The boy and a 50-year-old man were wounded during the shooting. The man was shot in one leg and the child was hospitalized in critical condition.