Earlier on Sunday, a car police believe was the getaway vehicle was found in a Columbus parking lot.
Twenty-nine-year-old Jennifer Nelson was found dead at her Dayton home on Friday after a Maryland couple discovered the woman's son at an Interstate 70 rest stop in central Ohio. The travelers said the boy told them a strange man had shot his mother in their home.
Authorities in Dayton planned to discuss the case at a news conference later Monday morning.
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