DENVER -- Denver police cordoned off a 10-block area near 10th and Marion after a woman was violently attacked Friday evening in the Capitol Hill neighborhood and described her attacker as a white man with a shaved head -- matching the description of Denver's alleged serial rapist, Brent J. Brents.

The description prompted police to react with speed and manpower. More than 100 police officers flooded the area in search of the suspect. Officers shut down streets and went house to house, talking to potential witnesses.

However, as the evening progressed, 7NEWS Investigator Tony Kovaleski learned that police believe that the most recent attack is likely not the work of Brents, who is wanted for six sexual assaults -- five that occurred in the past week and one that occurred in November.

The victim checking out a unit that was supposed to be empty when she stumbled upon a man and a woman, Kovaleski said. The man assaulted the victim and then the couple fled in the victim's car -- a gray 2004 Mazda 6 sedan with license plate 980 KLS, he said.

Police later found documentation inside that empty apartment that may shed light on the identity of the couple, Kovaleski said. Although they don't believe that Brents is involved, investigators cannot be certain it wasn't him until the couple is found.

The woman was transported to Denver Health, where she is listed in serious but stable condition.

She called police at 5:51 p.m. and reported that she was attacked. She said the man was naked when he fled, and he was with a woman with brown hair and a muscular build.

Even though this is most likely not the same suspect involved in the other attacks, the latest victim is nevertheless the sixth person to be attacked in the Cheesman Park neighborhood in the past seven days, putting the neighborhood on edge.

A massive task force spent the past week searching for Brents, who has been linked by DNA to five sexual assaults in that neighborhood. Two women were attacked last Friday afternoon and three other people were sexually assaulted Monday evening, when a man with a knife broke into their home.