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CRAWFORD COUNTY (WTOL) - A nationwide search is underway for little Haylee Donathan.

The 4-year-old girl was last seen more than a week ago in Crestline, and investigators say she may be in danger.

They believe she's with her mother and Robbi Potter. Potter spent 3 years in prison for sexually assaulting two children.

One of the victims' mothers has a warning for Haylee's mom.

"I would tell her to get away. Run, as fast as you can. I mean, even if she doesn't do it for herself, she's gotta do it for her child," the mother said.

Haylee's father, his girlfriend and the girl's uncle are charged with helping Potter escape.

Investigators were checking possible leads near Phoenix, Ariz., after receiving tips that Haylee may be there. The Northern Ohio Violent Fugitive Task Force is handling the search.

"I'm a father myself and I can just imagine the fear in this girl, so we're not going to stop, we're going to keep going until we get her back safely," said Assistant Chief Deputy U.S. Marshal Drew Deserto.

Deserto said they are willing to speak with Potter and Haylee's mother to arrange a 'safe surrender.'

Talks are underway to get the case featured on America's Most Wanted.