The parents of the man who was shot in his car last month are offering a $10,000 reward to anyone who provides information leading to the arrest and successful prosecution of the person responsible for their son's death.

Ryan Trent was fatally shot while driving his white Chevrolet Silverado pickup truck northbound on Briley Parkway during the early morning hours of Sept. 28. Metro Detective Adam Weeks said the bullet was fired by another motorist as Trent was driving.

"No matter how small you might think the lead is, it might lead to an arrest," Trent's father, Glenn Trent, said. "We know it wont bring Ryan back to us, but it will give peace of mind to our family."

Police initially thought Ryan Trent died when his truck crashed into a nearby tree but later learned he'd suffered a gunshot wound to the head.

Trent, 29, grew up in Knoxville and was working as a night manager for Premier Parking in charge of four different lots downtown. He moved to Nashville June 17, 2015.

He would have turned 30 on Nov. 5 and was engaged to be married, his parents said.

Trent was killed just two days before visiting his family for the weekend, according to his mother, Sharon Trent.

"I talked to him the evening before he was shot," Sharon said. "He was happy to be coming home and to get to see everybody at home."

His parents said they feel they are on an emotional roller coaster -- laughing at memories of their "jokester" son and crying or feeling angry when they think about how Trent was taken from them.

They recalled how every New Years Eve at precisely midnight, Trent would call to say, "Happy New Year, mom and dad."

"Now the only way that we can hear his voice is from a voicemail that my wife saved from June 18, 2015," Glenn Trent said. "He was loved so much that whoever did this not only took our son's life, but took a piece of our life and our hearts.

"And I will never give up until I know who shot Ryan and why."

In addition to the award offered by Trent's family, Crime Stoppers and Premier Parking are offering $1,000 each for a total reward of $12,000. The reward is good for up to a year.

Police are asking anyone with information about Trent’s murder, or who may have overheard conversations of persons with knowledge of the case, to contact Crime Stoppers at 615-742-7463. Callers to Crime Stoppers can remain anonymous.

Reach Ariana Sawyer at 615-259-8382 or on Twitter @a_maia_sawyer.