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Ohio killing still a mystery to police

CINCINNATI — Ohio authorities are investigating multiple possibilities for why a 12-year-old boy fatally shot his 9-year-old half brother and then turned the gun on himself, a coroner said Friday.

The police chief said the answer might not ever be known.

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Jackson County Coroner Dr. Gregory Hawker said investigators don’t know whether the shootings in Jackson in southern Ohio were a murder-suicide, a suicide pact, or an accidental shooting followed by suicide.

Authorities say each boy had a single gunshot wound to the head.

‘‘You want to think it was an accident,’’ Hawker said, adding that there’s not enough evidence to draw any conclusion.

‘‘There was no sign of a struggle,’’ Hawker told the Associated Press.

He said only two bullets were fired, and two casings were recovered along with a .44-caliber handgun. The gun belonged to the boys’ grandfather, Police Chief Carl Eisnaugle said Friday. Investigators do not believe anyone else was involved.

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