From the AP:
RENO, Nev. (AP) -- Police said Sunday a DNA link between the disappearance of a 19-year-old woman and the December sexual assault of a college student leads them to believe a sole attacker was responsible for both cases. DNA taken from the scene where Brianna Denison was last seen Jan. 20 matches DNA gathered after the Dec. 16 sexual assault of a University of Nevada-Reno student who lived several blocks away, police commander Ron Holladay said. [...]
"People who know the suspect may not believe that he is capable of committing this type of crime and he may not necessarily have a violent criminal history," he said.
I wouldn't be surprised if this man described as a white male in his 30s may, when he is caught, be described by some who know him as someone who exhibited sexual violence in a way that so often gets described as "what he did was wrong, but ..."
What many people dismiss as nothing more than inappropriate behavior toward women comes from the same thought processes which leads to crimes such as these. In both cases the only person who matters to the offender is the offender.