Brown was charged with domestic violence assault after an incident with his ex-wife Molly.
New York Giants kicker Josh Brown admits committing domestic violence upon his ex-wife in letters, messages and a journal, according to police documents related to a 2015 arrest.
"I have abused my wife," the NFL player wrote in a journal entry that was part of the material obtained in an investigation stemming from Brown's May 2015 arrest and included in the case file unveiled Wednesday by the King County Sheriff's Office in Washington state.
Brown was charged with domestic violence assault after an incident with his ex-wife Molly, who told police he had been physically violent with her more than 20 times over several years.
Brown, 37, admitted in a signed 2013 "Contract for Change" made while in counseling that he physically, verbally and emotionally abused his then-wife.
Saying he had been "a liar for most of my life," Brown claimed to have been abusive to women since age seven after being molested as a young boy.
"I objectified women and never really worried about the pain and hurt I caused them," Brown wrote in an email.
The Giants re-signed Brown in 2015 to a two-year, $4 million deal, with team co-owner John Mara saying, "Based on the facts and circumstances we were aware of at that time, we were comfortable with re-signing him."
The NFL said in a statement Thursday they had re-opened a case against Brown in light of the new information.
"We will thoroughly review the additional information and determine next steps in the context of the NFL Personal Conduct Policy," a statement said.
"We will not be making any comments on potential discipline until that time."
The NFL's domestic violence policy has a six-game ban for first offenders with other lengths of punishment possible depending on circumstances.