James Michael Biela , 27 , is charged with murder of Brianna Denison , 19 . Police say the two had been dating for about a month and were planning to get married in August. Both crimes bear a striking resemblance to several other sexual assaults in the area , leading police to believe that Biela is a serial rapist . Denison last seen on friend 's couch during visit to hometown of Reno , Nevada . Police say Biela left previous victim 's panties as `` calling card '' near Denison 's body .
James Michael Biela , 27 , is charged with murder of Brianna Denison , 19 . Police say the two had been dating for about a month and were planning to get married in August. Denison last seen on friend 's couch during visit to hometown of Reno , Nevada . Police say Biela left previous victim 's panties as `` calling card '' near Denison 's body .