Forty-four-year-old Victoria Schafer was struck Sept. 2 near Old Man's Cave at Hocking Hills State Park and died at the scene.
Authorities initially believed the part of the tree that hit the Chillicothe (chihl-ih-KAHTH'-ee) woman fell on its own but the Ohio Department of Natural Resources later said it had evidence indicating there may have been foul play .
The department says it's now investigating the death as a suspected homicide.
Southern Ohio Crime Stoppers, the group offering the reward, says anyone with relevant information should contact local law enforcement.
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