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Jeffrey Collins, Associated Press
A television reporter takes video of Zinah Jennings' home on Wednesday, Jan. 4, 2012, in Columbia, S.C. Police said Jennings refuses to tell them the whereabouts of her 18-month-old son, who has been missing for more than a month.

COLUMBIA, S.C. — Police say they have used cadaver dogs to search a car and home belonging to the South Carolina woman they accuse of repeatedly lying to them about where her 18-month-old son is.

Columbia Police Department spokeswoman Jennifer Timmons said Thursday three search warrants had been executed 22-year-old Zinah (ZEE-nah) Jennings' car and home.

Jennings' mother says she has not seen Jennings' son, Amir, since Thanksgiving.

Jennings is charged with unlawful conduct toward a child after police say she told inconsistent stories about her son's whereabouts.

Columbia Police Chief Randy Scott wouldn't say if evidence had been found in the car or home.