RENO, Nev. (AP) - An ex-Marine and pipefitter already on his way to Nevada's death row death for the murder of a 19-year-old college coed was sentenced to four additional life prison terms on Friday on charges tied to sexual assaults on two other young women.

James Biela, 28, was convicted in June of raping and strangling Brianna Denison and jurors voted unanimously to execute him by lethal injection.

Washoe County District Judge Robert Perry on Friday added the four life terms - to be served consecutively - for the rape of another young woman and the kidnapping and sexual assault of a third.

Perry said he would sign the formal warrant and set the date for Biela's execution by Aug. 16. That will trigger an automatic appeal to the Nevada Supreme Court.

Washoe County Deputy District Attorney Elliott Sattler said during the 30-minute hearing Friday that the additional maximum sentences were needed to guard against the chance that any of the convictions are overturned on appeal.

In the event the death penalty is thrown out, Biela would have to serve a minimum of 45 years in prison on the other charges before he would be considered for parole, Sattler said. Each of the three sexual assault charges carries a minimum of 10 years and the kidnapping charge five years.