LINCOLN, Neb. (AP) — A Nebraska civil liberties group says records detailing the state’s purchase of lethal injection drugs are likely to prompt more costly litigation.

Records obtained and released Friday by the ACLU of Nebraska show that Chris Harris, CEO of the India-based Harris Pharma LLP, contacted state officials on April 14 to ask if they wanted a few thousand vials of sodium thiopental.

ACLU of Nebraska director Danielle Conrad says the emails and documents raise questions about the “shady foreign source” that sold the drugs, the price paid, Nebraska’s compliance with importation laws and the efficacy of the drugs it bought.

A spokesman for Gov. Pete Ricketts says a thorough reading of the documents shows the drugs were legally purchased, and notes that the ACLU has lobbied for years against capital punishment.