USA Today reports that a suspect has been arrested in the fatal shooting of a Tempe fire captain on Sunday. Hezron Parks, 21, will face second-degree murder charges for shooting Kyle Brayer, 34.

Brayer was in the back of a golf cart in downtown Scottsdale, Arizona at 2:30 a.m. when a red Scion TC coupe approached the cart from behind and bumped it several times. Brayer exited the cart and approached the driver of the coupe when he shot Brayer in the head and fled the scene, hitting several other cars along his escape route.

Brayer died in the hospital where he was taken for treatment.

Brayer served 10 years with the fire department and during that time started the Tempe Veterans Telemedicine Program in 2016, which provides in-home medical care to veterans considered high-risk in Tempe along with the Phoenix Veterans Administration hospital.

Brayer also joined the U.S. Marine Corps in 2002, something he had wanted to do since he was a child. He served nine months in Iraq, building bombs and rockets, says USA Today. He also served in the Philippines, providing humanitarian aid.

After that first deployment, he opened Epic Fitness in La Jolla, California, where he employed 14 trainers, yoga instructors, coaches and nutritionists. In 2006, he moved the company to Tempe and began teaching a college course on firefighter conditioning and fitness.

Brayer’s fellow firefighters reached out on social media, stating that the shooting was a “senseless act of violence” they will never understand.

News of the shooting of Brayer comes four months after the death of another fire captain from Tempe. Frank Reed died in a swimming accident in Portugal last October while vacationing.

*Photo credit Phoenix Police Department