Prosecutors admitted to being delayed while waiting for documents they had demanded from the office of Chief of General Staff, which were needed before they could interrogate military personnel.[37][38] Despite the limitations, prosecutors were able to confirm on August 6, 2012, that the villagers were clearly discernible from the footage of the unmanned aerial vehicle taken before the airstrike.[39] The Wall Street Journal reported that it was a U.S. drone that spotted the group on the Iraqi border.[4] On June 11, 2013, the Diyarbakır Prosecutor's Office, after investigating the case for more than 18 months, found negligence rather than deliberate intent by the military staff. They then declared a lack of jurisdiction and transferred the investigation to the military prosecutor.[40]