Upon further review

Former FBI Director Robert Mueller must expand his investigation into the NFL’s handling of the Ray Rice domestic abuse case to include the league’s long history of dealing with — or sweeping under the carpet — all too many similar incidents. Jerry Angelo, the Chicago Bears general manager from 2001 to 2011 — who’s worked in professional football since 1980 — told USA Today on Thursday that there were “hundreds and hundreds of cases” involving players beating women and children.

“We knew it was wrong,” he said. “For whatever reason, it just kind of got glossed over.”

While the Bears categorically insisted that they “do not know what he is referring to” and Angelo backpedaled on Friday, saying “I was embellishing a point,” his original words had more than a ring of the truth.

They must be either confirmed or put to rest as false.

Commissioner Roger Goodell — trying to salvage his own reputation and possibly his job after initially suspending Rice just two games as accounts began emerging about the horrific video showing the Ravens star knocking out his fiancée — has tasked Mueller, who now works for a law firm with close ties to the NFL, with probing the league’s handling of that case.

But having the lawman look only at Rice is not sufficient.

Given the mounting evidence that his was but one of many ugly or even criminal cases that the league preferred to handle “in house,” Mueller’s report will have little credibility unless he paints the full picture.