The Justice Department’s inspector general has been focused for months on why Andrew McCabe, as the No. 2 official at the FBI, appeared not to act for about three weeks on a request to examine a batch of Hillary Clinton-related emails found in the latter stages of the 2016 election campaign, according to people familiar with the matter.

The inspector general, Michael E. Horowitz, has been asking witnesses why FBI leadership seemed unwilling to move forward on the examination of emails found on the laptop of former congressman Anthony Weiner (D-N.Y.) until late October — about three weeks after first being alerted to the issue, according to these people, who spoke on the condition of anonymity to discuss the sensitive matter.

A key question of the internal investigation is whether McCabe or anyone else at the FBI wanted to avoid taking action on the laptop findings until after the Nov. 8 election, these people said. It is unclear whether the inspector general has reached any conclusions on that point.