ORLANDO, Fla. — Pieces of a tiny skeleton found in swampy woods can tell investigators one thing: Missing 3-year-old Caylee Anthony was killed. What they can’t help explain, authorities said Friday, is how or when she died.

DNA tests conducted on remains found by a utility worker last week less than a half-mile from where the child lived matched Caylee’s genetic profile, a county medical examiner said. But the only clue they give about her death is that her bones didn’t suffer trauma, said Orange County medical examiner Dr. Jan Garavaglia.

The discovery of the child’s remains came after months of searches, twists and turns in the investigation. Caylee’s mother, 22-year-old Casey Anthony, was indicted in October on first-degree murder and other charges, even though no body was found.

— From wire reports