The long-time trustee for the Schertz-Cibolo-Universal City Independent School district allegedly kicked down his son's door and held him in a headlock during an argument this month, according to police records.

The trustee, 50-year-old Gary Inmon, has told mySA.com that he was acting "completely in self defense" and that his stepson, 21-year-old Mark Morgan, was "high on something" during the argument around 5:30 p.m. on Dec. 20 at their home in the 400 block of Frank Baum in Schertz.

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"I had no choice but to protect myself and my little boy as anyone in my situation would have done," he said in an email.

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According to the police report, Morgan told police that he and Inmon were arguing over his 8-year-old brother not wanting to go to baseball practice. Morgan attempted to "walk away from the situation" by going to his room and closing the door, but Inmon allegedly "became irate and forced entry by kicking open the door."

Inmon then punched him in the face multiple times, Morgan said, and then choked him in a headlock while trying to drag him out of the room, according to the report.

The police records state Inmon "admitted to being the primary aggressor in the situation and choking Mark by 'headlock.'" He was subsequently arrested on a charge of assaulting a family member by impeding breath. He was booked into the Guadalupe County Jail.

Inmon reached out to mySA following a report on the incident. He said his stepson has a "long history of behavior issues and is currently on probation for conviction of felony assault of a female." Morgan, he said, was assaulting him, so he had to protect himself and his son.

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He said he threatened to call police on Morgan, which would've likely resulted in the revocation of his probation. Morgan, however, said "I'll show you" and called authorities first and told them Inmon had assaulted him first.

"I've never attacked or hit anyone in my life," Inmon said in the email, adding that he has no plans to resign from the school board.

Inmon's arrest comes on the heels of his reelection to a fifth consecutive term on the SCUC ISD board's Place 5 seat in November. A trustee since 2000, Inmon has served two stints as board president and two terms as vice president. In addition to his position on the school board, he is also currently running for Guadalupe County justice of the peace in Precinct 3.

In Nov. 2016, the State Bar of Texas suspended Inmon's law license for one year after determining that he had failed to communicate with a former client and return an advance payment made in a divorce case. After the client filed a complaint, Inmon said he immediately returned the $10,000 payment and paid $1,500 in legal fees.

While running for reelection to the SCUC board, Inmon called the situation a "private business dispute" and said he planned to open a law practice in Cibolo as soon as his suspension ended on Nov. 1. A profile of Inmon on the State Bar of Texas' website indicates he is operating a solo law firm, Inmon Law Office, focusing on probate and school law.

Reporters Kesley Bradshaw and Lauren Caruba contributed to this report, as did staff researcher Misty Harris.

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Caleb Downs is a crime reporter for mySA.com. Read more of his stories here.| cdowns@mysa.com | Twitter: @calebjdowns