Zimmerman, who was acquitted earlier this year of murdering teenager Trayvon Martin, was arrested after the incident at the home of Samantha Schiebe, Lemma said. He also was charged with two misdemeanors -- domestic violence battery and criminal mischief -- in connection with the same incident, Lemma said.
Zimmerman is being held in jail without bail and will make his first appearance in front of a judge Tuesday at 1:30 p.m. ET.
Schiebe called 911 at 12:30 E.T., Lemma said. Schiebe told dispatchers that Zimmerman broke a table and pointed the long-barreled shotgun at her. When she called for help, Zimmerman pushed her out the door and pushed small furniture in front of the door.
Schiebe gave responding deputies a key to the house. When they pushed the door open, they found Zimmerman, who was sitting and unarmed, Lemma said. He was passive and cooperative, Lemma said.
The aggravated assault charge, for allegedly pointing the gun at Schiebe, is a felony, Lemma said. The battery charge is for the alleged pushing and the mischief charge is for allegedly breaking the table, he said.
The sheriff's office is seeking a search warrant to look for two guns they believe are inside the home, he said.