Hero Down: Real County Deputy Mark Cox Dies From Heart Attack During Training

Holly Matkin

Real County Sheriff's Deputy Mark Cox died in the line of duty on Sep. 25.

Liberty Hill, TX – Real County Sheriff’s Deputy Mark Cox died in the line of duty on Sep. 25, when he suffered a heart attack as he was training to become a K9 officer.

Deputy Cox, 57, “did his best every day to do the right thing for the people of his community,” according to his obituary.

“It was because of his community that he found himself pursuing a lifelong dream of becoming a K-9 handler,” the obituary read. “He was in the process of training with a drug dog when the Lord decided Mark was needed elsewhere.”

Deputy Cox joined the U.S. Navy in 1979, immediately after he graduated from high school.

He traveled the world during his time with the military, and ultimately retired as a chief petty officer in 2003.

“Law enforcement, however, was Mark's passion and calling,” his obituary read.

He served several departments in Florida and Texas before he joined the Real County Sheriff’s Office three years ago, according to the Officer Down Memorial Page.

“I want to say how very much Deputy Mark Cox will be missed in our community,” Real County Sheriff Nathan Johnson said, according to an Uvalde Police Department Facebook post.

“Mark was an excellent peace officer, a patriot, a man of his word, and a friend…… he will be deeply missed by his brothers in arms,” Sheriff Johnson said. “Our thoughts and prayers go out to his family and loved ones who grieve.”

Deputy Cox leaves behind his wife of 38 years, LeAnn, as well as his two daughters, grandchildren, sisters, and many friends and extended family members, his obituary read.

Deputy Cox was laid to rest on Saturday.

Our thoughts and prayers are with the family of Real County Sheriff’s Deputy Mark Cox, both blood and blue. Thank you for your service.

Rest easy, hero. We’ll hold the line from here.

Comments (6)
No. 1-4

Law Enforcement is a young man's game. Certainly just my opinion, but I sure see a lot of heart attacks amongst the older guys on the job. Most agencies have some form of retirement at or near 50. That's not because they love us so much they want to give us this special gift. It's because most of us are not Chuck Norris. The human body just isn't up to the stress and combat that comes with the job after that age. . .


How sad. I'm sure Deputy Cox was willing to give his all for fulfilling a dream. Condolences to his family, co-workers and community.


Blessed are the PEACEMAKERS for they shall be called the SON'S of GOD. Matthew 5:9


Rest in peace, Deputy Cox. Thank you for your service to our country, and to all the communities you served.

Fallen Heroes