(Portland, OR)  --  A man and a woman charged in the death of their newborn daughter are awaiting trial after pleading not guilty.  Thirty-four-year-old Jamie Mangus and 29-year-old Sarah Mangus are charged with murder in the death of the newborn, Krystal Mangus.  The Oregon State Medical Examiner's office determined the causes of death as methamphetamine intoxication and neonatal pneumonia.  Police say the baby died after being born on April 12th at an apartment on North Newman Avenue in Portland.