(Portland, OR)  --  A Multnomah County man is facing charges after allegedly screaming racial epithets at two African American children and then threatening them with a butcher knife.  Court documents show 60-year-old Troy Amatullo pleaded not guilty yesterday to charges of intimidation and menacing.  Police say Amatullo screamed the N-word and other insults at an eight-year-old boy and his 14-year-old brother as they passed his apartment.  He then allegedly went into his kitchen and grabbed a butcher knife, which police say he used to threaten the boys.