Despite what many felt was exceedingly light punishment, the Giants released Brown shortly after his admission of abuse.
Brown admitted to abusing his now ex-wife in a series of documents, including emails and journal entries that became public last October.
"We reopened the investigation based on new info", the league explained in a text message. The league said Brown will not appeal the discipline.
The news comes about a month after Ezekiel Elliott was suspended six games for violating the league's personal conduct policy following an investigation into domestic violence allegations against the Cowboys running back. "The holding down was the worst moment in our marriage", he added.
The league took much flak for how they and the Giants handled the Brown situation from top to bottom, including the fact that NFL's own security team was called in at a hotel to protect Brown's wife from him during a past Pro Bowl.
He reiterated, however, that he never hit, slapped or choked Molly Brown, who had told police of at least 20 violent incidents involving her now ex-husband that began in 2009, while she was pregnant. "I never did those types of things". Molly Brown had said he grabbed her by the wrist during a previous argument.
'We believed we did the right thing at every juncture in our relationship with Josh, ' Giants co-owner John Mara said in a statement. 'Our beliefs, our judgments and our decisions were misguided.
Brown has not publicly commented on the new findings, although he is said to have accepted the six-game ban, which would go into effect only if he is signed by another team, which appears unlikely. The Giants took it a step further by cutting ties with Brown just four days later on October 25.
Elliott was suspended in early August after the league's year-long investigation concluded he used physical force against ex-girlfriend Tiffany Thompson in the summer of 2016, prior to his rookie season. The league says it's purely a coincidence.