Officer Michael Biela , 19 , is charged with murder of Brianna Smith . Police : Biela 's DNA and truck , car , witness information . Meanwhile , investigators are certain there are other victims who just have n't come forward . Former student Denison , 19 , was found dead in February . She disappeared while visiting friends at the University of Nevada , Reno .
Officer Michael Biela , 19 , is charged with murder of Brianna Smith . Police : Biela 's DNA and truck , car , witness information . Former student Denison , 19 , was found dead in February . She disappeared while visiting friends at the University of Nevada , Reno .