In a pretrial hearing Tuesday at the Guantánamo Bay military tribunal, Clive Stafford Smith, a lawyer for a potential witness in the war crimes case, accused government prosecutors of “outrageous” misconduct.

During the hearing for the case of Abd al-Rahim al-Nashiri, who is charged with masterminding the October 2000 attack on the USS Cole, Stafford Smith said the government attorneys had failed to release exculpatory information about Nashiri and made false statements in the course of their failure.

Stafford Smith, the lead counsel for Ahmed Rabbani, a former Guantánamo detainee who was tortured by the CIA, made the allegations after being called to the witness stand by Nashiri’s defense team.

Stafford Smith testified that the prosecutors had filed a brief that falsely said Rabbani had not recanted his initial testimony because, Rabbani said, it was made under torture. After raising the omission, Stafford Smith said, he felt it was not getting due attention and took the unusual step of reporting the prosecutors to their state bar associations.

“I’ve never, ever, in 40 years reported someone to the bar before this case,” Stafford Smith said in court. “I don’t like doing that, but I felt I was required to.”