Hanley told the FBI that she recommended Platte River “wipe the Archive Laptop” after the emails were transferred onto the company’s server. But the employee told investigators that while he deleted the emails from the laptop, he did not “wipe” it.

Emails deleted from an application might not be permanently erased. In fact, the FBI found nearly 15,000 emails that Clinton never turned over to the State Department, some of which had been deleted over time and were never found by Clinton’s lawyers. They ended up, among other places, in the “slack space” of servers Clinton had used, according to FBI Director James Comey.

The Platte River employee told the FBI that he deleted the emails from the Gmail account, but that turned out not to be entirely true. Investigators later found 940 emails sent or received in 2010 that, as of this past June, were still in the account. The FBI found that 56 of them have been identified as being currently classified at the “confidential” level.

After the employee deleted emails from the “Archive Laptop,” he shipped it by U.S. mail or UPS (he apparently couldn’t remember) to an unidentified Clinton aide at an office location. (The precise address is redacted.)

But that aide never received the laptop. She told the FBI that “Clinton’s staff was moving offices at the time, and it would have been easy for the package to get lost during the transition period.”

The thumb drive containing the second copy of the archive also was never found.

“Neither Hanley nor [the Platte River employee] could identify the current whereabouts of the Archive Laptop or the thumb drive containing the archive, and the FBI does not have either item in its possession,” the FBI report stated.

The FBI’s inspection of the Gmail account used to shuttle Clinton’s emails also turned up other concerns. Of the 940 emails still in the account, 302 “were not found in the set of e-mails” that Clinton eventually turned over to the State Department in December 2014, following the request that former secretaries produce their emails. Those may be some of the 15,000 emails that the FBI later discovered.

The FBI also found other instances in which Clinton emails were intentionally deleted. In or around December 2014 or January 2015, two of Clinton’s lawyers—Cheryl Mills and Heather Samuelson—decided they wanted to remove copies of Clinton’s emails on their own laptops. The copies has been placed there months earlier during a remote transfer from Platte River.

The FBI found that an unidentified individual (who again appears to be the Platte River employee) used a program called BleachBit “to delete e-mail related files so they could not be recovered.” The employee also told the FBI that an “unknown Clinton staff member” directed him to remove a backup file of the emails on the Platte River server. It’s not clear from the FBI report who that Clinton staffer was and why he, or she, decided to remove the backup, known as a .pst file, from the company’s server.