The Greek authorities said Thursday that they would press charges against Marion True, the former antiquities curator at the J. Paul Getty Museum in Los Angeles, for illegal possession of 29 ancient artifacts police officers found this spring in her Greek villa.

George Gligoris, head of a special police unit that investigates antiquities smuggling, said that the scope of the charges would hinge on archaeologist appraisals of the objects. If their value is determined to be less than $96,000, he said, Ms. True could simply face a misdemeanor charge punishable by fines.