(St. Paul, MN)  --  This is sentencing day for a St. Paul man involved in the fatal shooting of a Maplewood police officer last spring.  Twenty-one-year-old Joshua Martin pleaded guilty to assisting Jason Jones, the man who shot and killed Maplewood Police Sergeant Joseph Bergeron May 1st.  Police were looking for the two men after a carjacking, and Martin testified that he and Jones came across Officer Bergeron as he sat in his squad car.  Martin said Jones approached Bergeron and shot him in the head.  Jones later attacked another officer who shot and killed him.  At sentencing this morning, Martin faces a prison term of up to 35-and-a-half years.