Five months after NASA investigators and local agents swooped into a Riverside County restaurant and detained a woman who was trying to sell a moon rock, no charges have been filed and NASA isn't talking.

The target, Joann Davis, a 74-year-old grandmother who says she was trying to raise money for her sick son, says the lunar material was rightfully hers and had been given to her space-engineer husband by Neil Armstrong in the 1970s.

The strange case centers on a speck of moon rock encased in an acrylic-looking dome that appears to be a paperweight.

For years, NASA has gone after anyone selling lunar material gathered on the Apollo missions because it is considered government property, so cannot be sold for profit.