Denver Broncos rookie cornerback Perrish Cox is seen in a photo provided Friday, Dec. 10, 2010 by the Douglas County, Colo., Sherrif's Office. Police in a south Denver suburb say Cox has been arrested for investigation of felony sexual assault. Michelle Kivela, the public information officer for the city of Lone Tree, Colo., says Cox was arrested Thursday night following an investigation into an Oct. 28 incident. The case filing has been sealed at the request of the district attorney's office.  (AP Photo/Douglas County Sherrif's Office)

Denver Broncos rookie cornerback Perrish Cox is seen in a photo provided Friday, Dec. 10, 2010 by the Douglas County, Colo., Sherrif's Office. Police in a south Denver suburb say Cox has been arrested for investigation of felony sexual assault. Michelle Kivela, the public information officer for the city of Lone Tree, Colo., says Cox was arrested Thursday night following an investigation into an Oct. 28 incident. The case filing has been sealed at the request of the district attorney's office. (AP Photo/Douglas County Sherrif's Office)