BRUNSWICK, Ga. – A frantic caller told authorities he had just come home to find several relatives apparently beaten to death and another barely breathing, according to a 911 tape released Monday from the weekend attack at a mobile home park in southeast Georgia.

“My whole family is dead!” screamed Guy Heinze Jr., 22. “It looks like they’ve been beaten to death. I don’t know what to do, man.”

When authorities arrived Saturday morning, they found seven people dead and two clinging to life. One of the survivors died Sunday, raising the death toll to eight.

Police have declined to say how they were killed or why and have said they don’t know whether the attacker is still in the area. Police have not identified a suspect and are offering a $25,000 reward for information.

Heinze, who spoke with the 911 operator from a neighbor’s house, was later arrested on drug and other charges, including lying to police.

On the 911 call, Heinze said his father, uncle and cousins were among the dead. After handing off the phone to an employee at the mobile home park, Heinze apparently returns to the trailer and is overheard on the call screaming that his cousin Michael, who had Down syndrome, was still breathing and that his face was “smashed in.”

“Michael’s alive, tell them to hurry!” Heinze said, in the background. “He’s breathing! He needs help!”

Police on Sunday said one person rescued at the scene, 19-year-old Michael Toler, had died at a Savannah hospital.

The only survivor, whose name and age have not been released, remains in critical condition.