Vincent Jackson’s Brain Has Been Donated to Boston University’s CTE Center.

Former NFL receiver Vincent Jackson might have died in his Florida hotel room up to three days before being pronounced dead there, according to new information released by the Hillsborough County Medical Examiner on Thursday.

The new details released by the medical examiner’s office Thursday came on the same day a Jackson family spokesperson confirmed to ESPN that the family donated his brain to Boston University’s CTE Center in an effort to learn more from his death.

Based on the timeline of events described in the Initial Case Summary provided to ESPN by the medical examiner’s office, Jackson was located by the Hillsborough County Sheriff’s Office as part of a welfare check on Feb. 12. Then on Feb. 13 and 14, the hotel staff entered his room and noticed that he was seated on the couch but slouched over.

On Feb. 15, hotel staff again entered Jackson’s room and determined he hadn’t moved from his previous spot and called 911 at 11:37 a.m. There were no signs of trauma or injury, other than a small laceration on his left big toe, according to the report.