Police have arrested one man and are looking for the alleged shooter in the death of a 15-year-old Buford High School student Monday outside a gas station.

Savion Nathaniel Dillard, 20, of Jonesboro, is wanted for allegedly shooting Branden Gerena in the head near the Gas Plus in the 4500 block of Thompson Mill Road before stealing his backpack and marijuana, according to an arrest warrant obtained by Channel 2 Action News.

Denzel Wilburn, 21, of Buford, was arrested and accused of driving the two away from the scene, according to another arrest warrant.

Gerena was taken to a hospital, where he died, AJC.com previously reported. He had just completed his freshman year at Buford High, according to a brief statement from Buford City Schools.

RELATED: Buford High School student killed in shooting outside Gwinnett gas station

Investigators learned Gerena and his friend were at the gas station when a man in his 20s approached them and opened fire just after midnight. The friend, also 15, was not hit.

Investigators have video of the teens hanging out in front of the gas station, Channel 2 reported. The video shows them walk to the back of the business, where there are no surveillance cameras.

Gwinnett police said in a Wednesday news release that Dillard and Wilburn went to the gas station with the intent to rob the two 15-year-olds, who were selling marijuana.

Dillard faces charges of felony murder, armed robbery, possession of a firearm during the commission of a felony and aggravated assault, while Wilburn was charged with armed robbery and conspiracy to commit a misdemeanor, according to the warrants.

As of Wednesday afternoon, Wilburn remained in jail without bond.

Anyone with information about Dillard is asked to contact Gwinnett police at 770-513-5300. Tipsters can remain anonymous, and be eligible for rewards of up to $2,000, by contacting Crime Stoppers Atlanta at 404-577-8477, texting information to 274637 or visiting the Crime Stoppers website.

In other news:

Duluth police officer Ted Sadowski said the scare began over the weekend after an officer noticed a car in front of him with a plate that didn't match.