MARIETTA, GA (WXIA) – Marietta Police said three people have been arrested with the Monday evening shooting death of a 21-year-old man in a Craigslist-related murder.

Investigators said the victim, James Jones Jr., a student at Clark Atlanta University, arrived at the location in the 300 block of Jamaica Cove at about 9:30 p.m., answering a Craigslist ad for an iPhone 6 that was supposedly for sale. When he arrived at the location, police said Jones was robbed and shot by the suspects, who they said posted the ad. Jones was pronounced dead at the scene.

Officers found the victim Monday evening after receiving a 911 call about a possible vehicle accident at the Jamaica Cove address. When they arrived, they found Jones in the driver's seat, dead from a gunshot wound.

ATLANTA -- The Atlanta Police Department Homicide Unit will be featured on the new season of A&E documentary series "The First 48."

The television program follows detectives as they search for clues and interview witnesses in the first two days of a murder investigation. It has profiled police departments across the country, including DeKalb County.

"The First 48" crews filmed Atlanta's Homicide Unit members as they investigated and solved homicides throughout the city.

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ATLANTA -- A man in his early 20's was stabbed to death in southwest Atlanta Wednesday night.

The victim, 27-year-old Nicholas Roberts of Atlanta, was killed at around 10:30 p.m. at the Deerfield Gardens Apartments in the 2900 block of Campbellton Road SW.

Witnesses told police Roberts got into a fight with someone shortly before the stabbing.

Police said the witnesses are cooperating and may be able to lead investigators to a suspect.