"The FBI also has not provided any additional explanation for the remaining roughly 400 missing assets," Linda Calbom, the GAO's director of financial management and assurance wrote in a letter.
The letter, dated Friday, was addressed to Senate Judiciary Committee Chairman Arlen Specter, R-Pa., and addressed many of the follow-up questions that the committee had for GAO. The GAO released a report in May detailing the flaws in the FBI's Trilogy system.
It reported that the FBI could not locate more than 1,200 pieces of equipment, valued at about $7.6 million. The FBI responded by saying that it had accounted for 800 of those items, but GAO could not verify that claim, Calbom wrote.