A Cullman County truck driver has been charged with negligent homicide after rear-ending, then running over a motorcyclist in Baton Rouge, Louisiana.

The truck driver, Howard Lyons, 61, was arrested following the crash, which was witnessed by several Baton Rouge Police officers and an Alcohol Beverage Control officer already on scene responding to an earlier, unrelated incident.

Friends describe the victim, Ryan Carter, as a man of unmatched kindness and immeasurable talent, with a heart as big as his smile. A motorcycle enthusiast, Carter also loved photography and spent his time shooting pictures of nature, wrestling and roller derby.

On Tuesday afternoon, Carter, 38, was killed while riding his motorcycle. Baton Rouge Police say Lyons driving an 18-wheeler repeatedly struck and then ran over Carter after he was thrown from his motorcycle on Florida Boulevard near North Eugene Street.

According to the arrest report, officers were investigating a crash in the 2500 block of Florida Boulevard at 4:34 p.m. Tuesday when they saw a black motorcycle traveling eastbound, followed by a red 18-wheel truck pulling a tanker trailer.

As Carter passed the truck on his motorcycle, police witnessed him yell something at the truck driver, who then drove forward and struck the motorcycle several times in the rear, the report says.

While an officer yelled for the vehicles to pull over to the side of the road, Lyons instead accelerated and struck the motorcycle in the rear again, the report says.

On impact, Carter was thrown from his vehicle and run over by “every tire on the passenger side of the truck,” according to the report. Carter was immediately killed.

Photos from the scene show the motorcycle wedged beneath the front bumper of the semi.

Lyons told police he has been driving trucks for more than 40 years and did not see the motorcyclist at the time of the incident.

He said he thought he had hit a pothole and was accelerating to keep up with traffic, though a surveillance video shows the motorcycle was several vehicle-lengths in front of the 18-wheeler before the final crash, the report says.

Lyons was booked into East Baton Rouge Parish Prison on one count of negligent homicide.

According to a traffic court clerk in Cullman County, Lyons has incurred at least two traffic tickets in the last 20 years in the state of Alabama, one in 2001 for speeding at 78 mph in a 65 mph zone, and another in 2010 for a seat belt violation. Both tickets were paid, she said, and both were received in Colbert County.

Friends took to social media Wednesday to mourn Carter and share stories about his life.

According to Stacy Sullivan, a friend of Carter’s, he was a photographer who ran his own company, Spade Photo. She said his photography was all his own, from his equipment to his website.

“He loved taking photos, and it definitely showed in his work,” Sullivan said. “He loved his wife, his cats and his motorcycles, and he loved photographing all of those things as well.”

Sullivan is also the president of Red Stick Roller Derby, a local roller derby league. According to Sullivan, Carter began to volunteer his time with the league to take head shots of the team, in addition to shooting their games, when his wife joined as a skater.

Anna Lacy, president of Red Stick Junior, a roller derby league for girls from ages 7-17, said Carter would also take head shots for the skaters in her league. He was great with kids, she said, and was always full of jokes and creativity.

“Even if the kids were nervous, he just had this attitude where they were instantly confident and comfortable around him,” Lacy said.

She added that Carter loved animals and spent so much time photographing Mike the Tiger at his LSU enclosure that Mike would recognize him when he arrived with his camera.

“He would come right up to the glass and start rubbing his head on the glass like he was a house cat wanting scratches when Carter showed up,” Lacy said.

By Wednesday afternoon, a fundraising post began to circulate on Facebook seeking donations to expense Carter’s funeral and support his family through their loss.