Texas police arrested Richard Acosta Jr., the alleged getaway car driver for a weekend shooting that killed three teenagers and critically wounded a fourth, but say the gunman remains at large.

Acosta, 33, was arrested after turning himself in Monday night once he saw himself on the news, according to KDFW Fox 4 News. Authorities said Acosta drove himself and the shooter in a Dodge Ram pickup truck away from the Sunday shooting at a gas station in Garland, Texas, surveillance footage shows. Footage shows Acosta entering the gas station before the shooting.

Acosta was charged with capital murder. He is being held on a $1 million bond and has no identified lawyer currently.

The suspected shooter is shown in the surveillance footage wearing a baseball hat, a blue surgical mask, and dark-colored athletics shorts. Authorities have not named a suspect.

"The shooter is at large," Lt. Pedro Barineau told The Associated Press.

On Tuesday, city police also said the 14-year-old boy who was initially identified as a suspect by Garland authorities Monday was released to his family and is "not being charged at this time."

The 14-year-old cooperated with investigators and was released due to new information investigators acquired after Acosta turned himself in.

"Detectives learned the 14-year-old male who was taken into custody has intimate knowledge of the shooting and he is cooperating with the investigation," said the Garland Police in a news release, according to KDFW Fox 4 News.

He is still a person of interest in the case, though, KDFW Fox 4 News reported.

Authorities have yet to name the boy.

Gas Station Shooting, Garland, Getaway Driver Arrest
This undated photo released by the Garland Police Department, shows Richard Acosta Jr., 33, a resident of Garland, Texas, who has been arrested and charged with capital murder, accused of being the getaway driver in a shooting Sunday night, Dec. 26, 2021, at a gas station convenience store in the suburb northeast of Dallas. Garland Police Department via AP

The shooting was captured on surveillance video. It shows a shirtless boy or man with a handgun approaching the gas station store while crouched. He swings open the door and starts shooting from the doorway.

Police said the shooter fired more than 20 rounds from a .40-caliber pistol before fleeing in the Dodge Ram pickup driven by Acosta, who they said also brought the gunman to the gas station,

Those killed were 14-year-old Xavier Gonazalez, 16-year-old Ivan Noyala, and 17-year-old Rafael Garcia, according to police. Before releasing their names, police had said two of the dead were 16 years old.

A 15-year-old who was a cook at the store was taken to the hospital following the shooting. Barineau said he is expected to survive.

Investigators believe the shooting was a retaliatory attack on one or more of the people in the store, Barineau said.

The Associated Press contributed to this report.

Gas Station Shooting, Garland, Getaway Driver Arrest
On Tuesday, city police said the 14-year-old boy who was initially identified as a suspect by Garland authorities Monday was released to his family and is “not being charged at this time.” In this photo, continuous lines of vehicles find gasoline at the Texaco station on Harding Avenue as they fill up in preparation for the possible impact of Hurricane Lane on Wednesday, Aug. 22, 2018, in Honolulu, Hawaii. (Photo by Kat Wade/Getty Images) Kat Wade/Getty Images