Pseudoephedrine, a main ingredient in a number of decongestant medications, is used in illegal methamphetamine labs.
Linda Green has filed a wrongful-death suit, claiming that drug companies and suppliers --including Pfizer, Wal-Mart, Walgreen, Dollar General and United Supermarkets-- knew methamphetamine addicts were buying the drug to get high and not to treat a cold, The Oklahoman reported.
She also charges makers knew how to make the pseudoephedrine tablets without allowing drug addicts to extract the ingredients needed to make methamphetamine.
"The reason for filing this suit is to hold those people accountable for what they've done, not just to Nik Green and his family (but for) every other person in the United States who's been impacted," said Gary James, an Oklahoma City attorney representing Linda Green.
The suit also names Ricky Ray Malone, who was convicted of killing trooper Nikky Joe Green. Malone was high on methamphetamine during the December 2003 shooting, the newspaper said. A mobile methamphetamine lab was found in Malone's car.