DNA evidence now links the suspected abduction of a 19-year-old woman from a friend’s home to two attacks on women near a university late last year, and authorities said Thursday that they’re investigating still another attack that could be related.

Already linked to a sexual assault in December, DNA evidence ties the suspected abduction of 19-year-old Brianna Denison on Jan. 20 to a November attack in the same neighborhood, police said.

And police have released a sketch of a suspect in an October attack in a parking garage near the University of Nevada, Reno, that investigators believe might be tied to the other cases. The woman who said she was attacked came forward because of the media coverage of Denison’s disappearance, University Police Chief Adam Garcia said.