The NFL continues to investigate an incident involving Dallas Cowboys running back Ezekiel Elliott, NFLPA sources and a source close to the Cowboys rookie told ESPN.

One of the sources said the league is trying to be thorough in its investigation, and Elliott is aware that the league is still gathering information.

The NFL has been seeking information from the Aventura (Florida) Police Department regarding the February incident that involved Elliott and the same woman who accused him of domestic violence in July in Columbus, Ohio, according to one source.

A person in Elliott's camp said he recently was informed that, with the incidents in Florida and Ohio under investigation, the Cowboys running back is now viewed by NFL investigators as "Public Enemy No. 1."

Ezekiel Elliott was suspended for six games last season for violating the NFL's personal conduct policy. Matthew Emmons-USA TODAY Sports

The source said the NFL wants to make sure that there are zero mistakes the way there were in its investigation of former Ravens running back Ray Rice, and it is trying to be as thorough as possible.

The league is still investigating cases involving former Giants kicker Josh Brown, who was released Oct. 25, shortly after his admission that he abused his wife became public, and Broncos cornerback Aqib Talib, who suffered a self-inflicted gunshot wound to his lower right leg in the early hours of June 5 in Dallas.