The unidentified woman, who testified she was initially confused about the alleged rape after drinking too much, said at one point she told Officer Anthony Rollins, a 13-year Anchorage police veteran, she felt a need to go to a hospital after feeling something had happened to her that night.
Rollins told her that wasn't a good idea, she testified in state Superior Court, saying Rollins indicated he was worried about his DNA being found on her.
Rollins, 43, is charged with sexually assaulting six women from 2006 to 2009. He also faces charges of official misconduct and illegal use of a computer.
He has pleaded not guilty to all charges.
The woman, 22 at the time, testified after drinking too much Sept. 5, 2008, she woke up in an alcohol sleep-off center, and Rollins drove her toward her home.
In the car she told him she felt that something had happened to her that night.
"He said, 'Something probably did happen to you,' and that was pretty much the end of that," the Anchorage Daily News quoted her as testifying.
Five women have testified Rollins forced them to have sex or perform sex acts while he was in uniform and on duty as a police officer.