Sam Aguilar, 33, was shot and killed just after 2 a.m. on Tuesday, July 22, 2014, on a sidewalk near 63rd Street and Francisco Avenue in Chicago’s Chicago Lawn neighborhood. A gold or beige Nissan Maxima was reported to have rolled north on Francisco while the rear passenger extended an arm from a window and fired about five shots, striking Aguilar. He was taken to Advocate Christ Medical Center in Oak Lawn and pronounced dead at 10:16 a.m.; records list his residence on the 1500 block of West Walton Street in West Town.

Patrol officers witnessed the drive-by, pursued the vehicle through an alley between 60th and 61st Place, and stopped it in the 6000 block of South Central Park. One occupant fled and was taken down after a sergeant chased him and struggled with the suspect, who reached for the sergeant’s gun; another occupant was detained nearby. By Thursday, two men were charged in connection with the killing: Christian Alvarez, 18, and Antonio Castaneda, 31, each with first-degree murder; Castaneda also faced aggravated battery to a peace officer and attempting to disarm a peace officer. An additional witness identified both men in a lineup, and police said a third person had been in the vehicle but was not charged.

If anyone saw the Nissan Maxima that night or has information about the third occupant, please share what is known.