Police in Houston, Texas have identified the shooter who opened fire at Joel Osteen's Lakewood Church on Sunday as Genesse Ivonne Moreno, Fox News has confirmed.

Moreno, who has a lengthy criminal record and was born as a man – Jeffrey Escalante – from El Salvador, was killed after off-duty police officers at the church responded to the incident. 

A search warrant said Moreno pointed an AR-15 at the officers who then fired upon her and killed her in self-defense.

The message "Free Palestine" also was written on the rifle used in the attack, investigators said.

This is a developing story. Please check back for updates.