PROSECUTORS SAY THEY PLAN TO CALL MORE THAN 50 WITNESSES DURING THE RETRIAL OF A FORMER SANTA FE COUNTY SHERIFFS DEPUTY CHARGED WITH MURDER. TAI CHAN ALLEGEDLY KILLED FELLOW DEPUTY JEREMY MARTIN IN LAS CRUCES TWO AND-A-HALF YEARS AGO. CHAN’S FIRST TRIAL ENDED IN A HUNG JURY LAST SPRING. HIS SECOND…… MORE