Collins was interviewed by police Monday about the shooting death of a 29-year-old pregnant woman in Baton Rouge, Louisiana. Brittney Mills, Collins' ex-girlfriend, was shot to death April 24 upon opening the front door of her home.
Mills' unborn child survived the shooting but died a week later in the hospital
Police said Collins is not a suspect in the case, nor even a person of interest.
Collins' representatives also told Anderson that Collins passed the polygraph test administered by an independent investigator in connection with Mills' case.
Collins, who was once seen as a likely first-round selection, was not selected in the last week's draft and is now classified as an undrafted free agent and, despite his original intention to do so, cannot re-enter the 2016 draft, an NFL spokesman told ESPN NFL Insider Adam Schefter.