Bangladesh lost $81 million in a historic cyberattack. Investigation remains unfinished a decade later.

Investigators are finalizing a decade-long inquiry into the 2016 Bangladesh Bank reserve heist, with a 10,000-page draft charge sheet sent to the attorney general’s office for legal advice.

North Korean hackers issued 35 fraudulent payment instructions on Feb. 4, 2016, seeking to steal $1 billion. They transferred $81 million to five Philippine bank accounts before the money was moved through two casinos. A separate $20 million transfer to Sri Lanka was blocked because of a spelling error.

The Criminal Investigation Department found evidence of negligence and collusion involving Bangladesh Bank officials. Sixty-four people and institutions have been accused, including former governor Atiur Rahman and nine other officials, according to a local media report.

Former governor Ahsan H. Mansur said authorities had changed law firms and reassessed the U.S. case, adding that “our chances of winning are good.”

The investigation report has been delayed 96 times. Its next court deadline is Aug. 9.