Missing boy may have been killed with mother

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DAYTON, Ohio (AP) -- Police in Dayton believe a missing Ohio boy may have been killed along with his mother in the basement of a house where investigators found "blood evidence," according to an affidavit.

The body of 25-year-old Nichelle McKnight was discovered last week near the Stillwater River in the Dayton suburb of Harrison Township. She vanished in March with her 4-year-old son, Zaden. The boy hasn't been found and is presumed dead.

An affidavit prepared by a Dayton police detective suggested both were killed in the basement. The Dayton Daily News and WHIO-TV first reported on the document Thursday.

Officers also found the shoes McKnight was wearing when she was reported missing, along with her bank cards, driver's license and Social Security cards for her and her son, according to the document, which doesn't provide any further details about the evidence found.

Dayton police Lt. Wendy Stiver declined to comment on the affidavit Friday except to say that "our detectives are working very hard at bringing justice to the victims in this case."

The house is the residence of 29-year-old Tonisha Harris, who has been charged with receiving stolen property, theft and misuse of a credit card in connection with McKnight's disappearance.

Police believe McKnight and Harris were in a relationship with the same man, 26-year-old Antwan Anderson, who was a suspect in the disappearance of McKnight and her son. He died of a self-inflicted gunshot in a shootout with police April 7.

Based on the affidavit, a judge ruled this week that DNA can be collected from Harris as part of the investigation. Online records did not list an attorney for her.