If she was coming into the country they could nail her for not declaring the money but if she was flying from Boston to Texas it's just another DEA game. We take it and you prove how you came by it, to a judge. If you win you get your money back (minus legal fees of course) and it's no skin off the DEA's ass.
A year or two ago the NJ police stopped two men from the mid-atlantic region somewhere leaving Atlantic City with $50k in cash. The DEA grabbed the money and said it must be drug money. Hello...AC...gambling...money....duh.