Do death row inmates have the right to know origins of lethal injection drugs?

Megan McCracken interviewed on PBS NewsHour, April 9, 2014

“Questions of the purity, the potency, the pH balance, whether or not a product is contaminated, that all comes into play. And if the states are able to hide that information and refuse to turn it over, the courts are prevented from carrying out a constitutional analysis of the procedures, and they are prevented from determining if the procedures comport with the law.”