NBC Sports: NFL Players Association investigating league's interview with Saints running back Khiry Robinson _lowres

Advocate staff photo by ELIOT KAMENITZ-- New Orleans Saints head coach Sean Payton watches New Orleans Saints running back Khiry Robinson (29) make a first down during the first quarter against the New England Patriots as they play at the Mercedes-Benz Superdome in New Orleans, La. Saturday, Aug. 22, 2015.

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The NFL Players Association is investigating the league's Personal Conduct Policy interview with New Orleans Saints running back Khiry Robinson.

NBC Sports reports, the interview was conducted after Robinson was fined by the team for an altercation with an intern during training camp in West Virginia.

The team reported the incident to the NFL and the league started their investigation, interviewing Robinson without a union representative.

The incident started after a dispute about Robinson and another player paying the intern a fee for driving the two players to a local store to get their phones fixed. While the other player paid the fee, Robinson refused because his phone wasn't fixed.

Arguing whether Robinson should still pay, resulted in Robinson hitting the intern in the head and the Saints fining him and reporting the altercation to the league.

Now, the union wants to answers as to why the interview took place without a union representative.

Click here to read the full NBC Sports story.