Portland, OR -

The Oregon Court of Appeals has upheld the murder conviction of a man who slashed his girlfriend's throat and tossed her body into a woodlot.

Delfino Hurtado-Navarrete confessed to the March 2009 slaying. But his appellate attorneys argued that he wasn't properly advised of his rights before he confessed.

The appeals court on Wednesday sided with prosecutors, who said Hurtado-Navarrete was read his rights multiple times in the days leading up to the discovery of his girlfriend's body and his confession.

Hurtado-Navarrete was sentenced to life in prison. His attorneys had requested that the jury consider a charge of first-degree manslaughter instead.