New Orleans police said Thursday they had booked the getaway driver in a Memorial Day killing in Broadmoor that took the lives of a teen once dubbed an anti-violence “ambassador” and his boyhood friend.

Keeenan Conley, 20, turned himself in on Wednesday, the same day that authorities identified Winston Jackson, 18, as the suspected shooter in the May 30 killings. Jackson remained at large as of Thursday.

Faisal Puckett Jr. and Charles Bannister were both shot to death near the front door of the residence in the 3300 block of General Taylor Street around 11:30 a.m. on May 30.

Homicide Detective Drew Deacon wrote in a warrant that surveillance video from the area showed a “perpetrator vehicle” cruising past the house moments before the shooting. The vehicle then returned to the area at the same time of the shooting, Deacon said.

Bannister’s great-grandmother said she was preparing food for a cookout when the barrage of bullets sounded toward her front door. By the time she got downstairs, both her great-grandson and his friend Puckett were dead.

Witnesses told police, according to the warrant, that the man who shot Puckett and Bannister ran toward a vehicle that took off westbound on S. Prieur Street toward Napoleon Avenue.

An eyewitness tagged Jackson as the shooter and Conley as the wheelman, according to the warrant, then identified both men from a six-person photo line-up.

Deacon obtained a warrant for the arrest of Conley, a Harvey resident, on June 23. Dawne Massey, a Police Department spokeswoman, said efforts were made to locate him before he turned himself in to the Orleans Parish jail on Wednesday morning.

A judge set bond for Conley at $500,000 on two counts of second degree murder.

Police have yet to establish a connection between the two men accused of participating in the brazen daytime killings and their victims, according to Dawn Massey, a Police Department spokeswoman.

Massey said the investigation was still in its “preliminary stages.”

Puckett won a writing contest in 2012 to become a national anti-violence “ambassador” and dreamed of leaving New Orleans, according to his aunt Nikki Roy. She said she had no idea how either suspect in the killing knew her nephew.

Follow Matt Sledge on Twitter, @mgsledge. | (504) 636-7432