Earlier this month, the Seller Beware blog covered New York Attorney General Eric Schneiderman’s well-publicized demand that four retail giants stop selling popular herbal supplements, allegedly because that DNA tests showed those supplements to be mislabeled.

That move by the NY AG has since come under fire, as experts have come forward disputing the validity of the tests used to evaluate the supplements.

Perhaps to buoy the tough position he’s taken against these herbal supplement makers, it appears the NY AG is now piling onto his earlier allegations with hefty subpoenas. The New York Times reports that the subpoenas received by retailers in the wake of the NY AG’s cease-and-desist letters demanded that the four retailers provide evidence of how they would prove the authenticity of their products’ advertising claims, in addition to the products’ contents.  If that is true, the NY AG may have more allegations up his sleeve for the industry.

We will keep you updated as this story unfolds.