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Even as the mother of two missing Montgomery County children refuses to say where her son and daughter can be found, family members say they believe the missing youngsters were seen less than two months ago near a Virginia mall. Missing siblings Jacob Hoggle, 2, and Sarah Hoggle, 4, have not been seen since early September. Their mentally ill mother was with them last and refuses to tell the children's father, her mother, or police, where the children are.

Catherine Hoggle – a schizophrenic who reportedly refused to stay on her medication -- remains in the Clifton T. Perkins Hospital Center. Hoggle says the children are safe, but has not given any information on their whereabouts. In a Facebook post Wednesday, the Hoggle family says it is now aware of a possible plan by Catherine to "escape."

Sightings of Missing Kids? There was a "possible sighting of the siblings on March 12 at Potomac Mills Outlet area in Woodbridge, VA. Both children were reportedly seen around 8 p.m. that day, the family said on the FindSarahFindJacob Facebook page.

The family says it considers most tips credible until proven otherwise.

In December, Montgomery County Police concluded that video from a New Jersey rest stop reputedly showing the missing children at the Joyce Kilmer Service Area off the New Jersey Turnpike near New Brunswick was not the Hoggle siblings.