On a series of thick concrete pads, it installed what a source called "prefabricated pods" to house prisoners, each separated from the other by five or six feet. Each pod included a shower, a bed and a toilet. Separate cells were constructed for interrogations. The CIA converted much of the rest of the building into garage space. Intelligence officers working at the prison were housed next door in the converted stable.
A woman who lives near the complex, and who refused to give her name for fear of retribution reports that when she often saw cars with black-tinted windows drive up to the buildings. When a garage door opened, all the lights in the complex would go off until the car had entered the building and the door had closed.
Electrical power for both structures was provided by a 2003 Caterpillar autonomous generator. All the electrical outlets in the renovated structure were 110 volts, meaning they were designed for American appliances. European outlets and appliances typically use 220 volts.
Locals report that English-speaking guards worked at the complex, and often swam in a nearby lake. The guards were rotated every 90 days.
Lithuanian officials provided ABC News with the documents of what they called a CIA front company, Elite, LLC, which purchased the property and built the "black site" in 2004. ABC News first reported that Lithuania was one of three eastern European countries, along with Poland and Romania, where the CIA secretly interrogated suspected high-value al-Qaeda terrorists.
The CIA purchased the riding academy property in March 2004, the same month Lithuania marked its formal admission to NATO. Poland joined NATO in 1999, and Romania joined in 2004.
The CIA opened the prison in Sept. 2004, and closed it in Nov. 2005, former CIA officials told ABC News.
The CIA declined to talk about the prison. "The CIA's terrorist interrogation program is over," said CIA spokesman Paul Gimigliano. "This agency does not discuss publicly where detention facilities may or may not have been."