Mindy McCready
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McCready, 36, who doesn't have legal custody of the child but is allowed visitations, was last seen after she picked up the boy from her father's Cape Coral, Fla., house. McCready's parents have custody of the boy.
A missing persons report was filed with police, according to the Associated Press, and a judge has ordered McCready to return Zander by 5 p.m. Thursday.
Late Tuesday night McCready posted a Facebook message saying, "My son is not missing" and that "police established that this afternoon via Skype."
"I have been fighting the Florida court system to protect my son, and bring him home," she writes. "Please do not worry."
McCready has been plagued by a number of personal problems in recent years, including an apparent overdose, suicide attempts and rehab.
