DeAngelo Hall in last Sunday’s incident (John McDonnell/The Washington Post)

The NFL is investigating DeAngelo Hall’s allegation of misconduct by an official as part of its probe of last weekend’s verbal confrontation that led to the cornerback’s ejection from the Washington Redskins’ loss at Pittsburgh, according to a person with knowledge of the case.

That aspect of the league’s review appears to be part of the reason that the league has not yet announced a fine of Hall. The person familiar with the case, who spoke on the condition of anonymity because the investigation is ongoing, said that such a thorough review “takes time.”

Hall remains eligible to play in the Redskins’ game Sunday against the Carolina Panthers at FedEx Field.

Another person close to the case said Friday that the league still plans to fine Hall but not suspend him, and warn him that further misconduct could produce a suspension. That person said the administrative process was not completed in time for a fine of Hall to be announced Friday.

Hall yelled and gestured at head linesman Dana McKenzie, appearing to use profanity, after a tussle with Steelers wide receiver Emmanuel Sanders at the end of a play late in last Sunday’s game. Hall suggested during a radio interview Tuesday that McKenzie had been verbally abusive of him, telling 106.7 The Fan that the official “was equally at fault” and was “dishing it out just as much as I’m dishing it out.”