"I was out of the country traveling to meet my daughters for a birthday celebration when I got the devastating news," Moore said in a statement through her rep. "The loss of a child is an unthinkable tragedy and my heart goes out to this young man's family and friends."
"I ask that you please respect the privacy of all concerned during this sensitive time," the 52-year-old actress added.
Edenilson Steven Valle, 21, had been part of a small party thrown at Moore's home by her assistant. He died shortly before 5 a.m. PT on July 19.
Friends and family reportedly told the coroner that Valle did not know how to swim. He had been left outside for a short time and was found floating in the deep end once someone came back outside. It was estimated that he had been in the water about 10 to 15 minutes, according to Los Angeles County coroner's Lt. Fred Corral. Firefighters were dispatched to Moore's home at 5:17 a.m., and Valle was pronounced dead on the scene.
The LAPD's West Los Angeles station is conducting an investigation into Valle's death. It is not a homicide investigation, as earlier in the day they considered the incident to be a tragic accident.