PUTNAM COUNTY, Fla. -- There was a possible new clue in the search for 5-year-old Haleigh Cummings Tuesday morning. The family said Haleigh's younger brother may have witnessed her abduction. Experts who work with children during criminal investigations are working with Haleigh's brother Tuesday.

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VIDEO REPORT: Brother: "I Wanna Find My Sissy"
INTERVIEW: Haleigh's Mom On Nancy Grace
MISTY TALKS: Watch WFTV Interview | See Images
THE TENT: See Tent Family Is Living In
ARCHIVE: Previous Reports On Haleigh Search

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"When I saw him on my visitation all he said was, 'I wanna find my sissy' and he said, 'Some man in black came in and took her.' and that he was all dressed in black, but I didn't question him. I'm not going to question him," said Haleigh's mother, Crystal Sheffield (watch full interview).

The 4-year-old boy gave the description to his mother nearly two weeks after his sister disappeared from her father's Putnam County home in Satsuma on February 9.

Crystal Sheffield appeared on CNN's Nancy Grace show Monday night and briefly talked about "the man in black." Sheffield also confirmed that she took and passed a lie detector test.

Investigators are no longer conducting ground searches, but said they're following up on over 1,600 tips. Putnam County investigators told Eyewitness News Tuesday that an anonymous donor gave $5,000, bringing the reward to $25,500.

GERALDO RIVERA CONFRONTS HALEIGH'S FATHER

During a national television interview on the show Crimetime, featuring Geraldo Rivera, Haleigh Cummings' father, Ronald Cummings, was questioned about allegations of abuse and drug use in the past.

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VIDEO REPORT: Ronald Cummings Questioned By Geraldo

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Cummings defended himself saying he never hit Haleigh or her mother in an abusive way. Ronald said he spanked Haleigh by the Department of Children and Families' standards of disciplining a child.

However, it was questions about alleged drug use that pushed Cummings over the edge.

"What about allegations of cocaine use, meth use?" asked reported Geraldo Rivera.

"There's nothing, I do not do drugs," Ronald responded.

"You don't do drugs? What about all those arrests?" asked Rivera. "Do you work for the police, are you an informant?"

"No I am not an informant; I do not work for the police," he responded.

The news crew was then chased off the property by the Cummings and his family, but before they left, Cummings made a plea into the camera for the return of his daughter.