(Portland, OR)  --  The 30-year-old sister of a Portland State University student-athlete is pleading not guilty in his shooting death.  KATU reports Tamena Strickland pleaded not guilty yesterday to one count of murder with a firearm and two counts of attempted murder with a firearm.  Police arrested Strickland August 2nd  for the shooting death of 22-year-old Deante Strickland earlier that day.  The siblings' grandmother and other sister were injured in the shooting.  Family members tell KGW8 Tamena entered a home on Northeast 42nd Avenue near Ainsworth Street Friday afternoon and shot the three family members.