The search took place last month and was the second time authorities had looked over the farm in Rowan County belonging to the adoptive grandfather of Erica Parsons, 15, who has not been seen since November 2011.
Rowan County sheriff's investigators and the FBI served the warrant Nov. 14, but the affidavit was not returned to court until Monday, the Salisbury (N.C.) Post said Tuesday.
The warrant was based on an October visit investigators accompanied by cadaver dogs had paid to the farm. The affidavit said the canines signaled the possible presence of human remains.
The farm is owned by the missing girl's adoptive grandfather; however, an out building where the cadaver dog alerted belongs to Erica's adoptive parents.
The Post said people who know the family have told authorities the parents were abusive. Deputies have said the family has not been cooperating in the search for Erica.
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