Nicholson began his statements by extending his sympathies to 21-year-old Julia Crabbe's family. He also thanked Washington for standing by his side.
Nicholson and another man dropped off Crabbe at a hospital in Ashburn last Thursday where she later died.
KANSAS CITY, MO - OCTOBER 02: Washington Redskins strong safety Montae Nicholson (35) before an NFL game between the Washington Redskins and Kansas City Chiefs on October 2, 2017 at Arrowhead Stadium in Kansas City, MO. The Chiefs won 29-20. (Photo b
Earlier this week, officers searched Nicholson's home.
According to the search warrant, investigators found pills, marijuana and a "foil with residue."
The medical examiner has not yet determined Crabbe's cause of death, but investigators said she showed signs of an overdose.
Despite the death investigation, Redskins head coach Bill Callahan announced Nicholson will play this Sunday against the Detroit Lions.