En kampanje er startet i Storbritannia i samarbeid med advokater i Pakistan for å få stilt den juridisk ansvarlige for CIAs droneangrep for retten.
John Rizzo har nylig gått av. I intervjuer har han fortalt hvordan han godkjente angrep med droner.
Også andre som har stått frem i intervjuer og fortalt om hvordan de opererer dronene, vil bli stevnet.
Menneskene bak kampanjen mener at rundt 2.500 ikke-stridende er drept i collateral damage. USA bestrider dette som altfor høyt.
Storbritannia har utviklet et «aggressivt» menneskerettsmiljø som vil bruke internasjonale konvesjoner over landegrensene.
The attempt to seek an international arrest warrant for Rizzo is being led by the British human rights lawyer Clive Stafford Smith of the campaign group Reprieve, and lawyers in Pakistan. The lawyers are also building cases against other individuals, including drone operators interviewed or photographed during organised press facilities.
A first information report, the first step in seeking a prosecution of Rizzo in Pakistan, will be formally lodged early next week at a police station in the capital, Islamabad, on behalf of relatives of two people killed in drone strikes in 2009. The report will also allege Rizzo should be charged with conspiracy to murder a large number of Pakistani citizens.
Now retired, Rizzo, 63, is being pursued after admitting in an interview with the magazine Newsweek that since 2004 he had approved one drone attack order a month on targets in Pakistan, even though the US is not at war with the country.
Rizzo, who was by his own admission «up to my eyeballs» in approving CIA use of «enhanced interrogation techniques», said in the interview that the CIA operated «a hit list». He also asked: «How many law professors have signed off on a death warrant?»
Rizzo has also admitted being present while civilian operators conducted drone strikes from their terminals at the CIA headquarters in Virginia.
Although US government lawyers have tried to argue that drone strikes are conducted on a «solid legal basis», some believe the civilians who operate the drones could be classified as «unlawful combatants».
US drone strikes were first launched on Pakistan by George Bush and have been accelerated by Barack Obama.
Campaigners seek arrest of former CIA legal chief over Pakistan drone attacks
UK human rights lawyer leads bid to have John Rizzo arrested over claims he approved attacks that killed hundreds of people