(Portland, OR)  --  A man who's accused of stabbing another man to death during a fight in Southeast Portland is in police custody.  Investigators say 38-year-old Michael Allen Shipley is suspected of killing 53-year-old Brian Bruns Tuesday night at an apartment building on Southeast 99th Avenue.  Police say Shipley was arrested yesterday on two outstanding warrants and a murder charge.  He's set to be arraigned today.