Cobb County police have arrested four suspects accused of shooting and killing a 31-year-old man as he slept inside his apartment.

A 911 caller reported the incident at an Austell apartment complex Sunday afternoon. Officers arrived to find the body of Andres Mesa-Munguia inside his Landmark Way apartment, Sgt. Wayne Delk said Thursday.

On Tuesday, investigators arrested the first two suspects: Santos Tomas Vasquez, 38, and Fredy Jimenez-Bonilla, 35, both of Austell. Vasquez and Jimenez-Bonilla both lived in the same apartment with Mesa-Munguia and were co-conspirators, according to their arrest warrants.

The warrant stated the two men “did knowingly meet with co-conspirators outside the incident location and allowed access to the apartment where the co-conspirators located and found the victim asleep,” their warrants state.

Vasquez and Jimenez-Bonilla were both charged with homicide and aggravated assault, jail records show. The two men, both natives of Honduras, were also being held on a possible immigration violations. Their mugshots were not available to be released late Thursday due to a judge’s order, according to a spokesman for the Cobb Sheriff’s Office.

Then on Wednesday, two more suspects were arrested during a joint operation with Homeland Security, according to police.

Dorian Acosta, 23, and Anthony Yoel Parada Lopez, 19, both of Marietta, were also charged in the case. Acosta and Lopez were each charged with murder, aggravated assault, and burglary. Lopez, a native of El Salvador, was also being held on a possible immigration violation.

The incident remains under investigation, according to police. Anyone with information on the case should contact the Cobb County Police Department’s Crimes Against Persons Unit at 770-499-3945.

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The new technology is being rolled out in Cobb County schools.