LOS ANGELES (AP) — The last days of Michael Jackson's life were filled with the adulation of fans, a rehearsal performance onlookers described as amazing and intense preparations for his big comeback in London. In good spirits, Jackson chatted with well-wishers outside his home and at the Staples Center where he practiced songs and dance routines before he returned home. Then, things took a tragic turn, according to Jackson's personal assistant, Michael Amir Williams, who testified Wednesday in the trial of the doctor charged with involuntary manslaughter in the superstar's death.