HONOLULU (AP) - An independent investigator has been appointed to determine whether the 95-year-old grandmother of the Honolulu police chief's wife needs a conservator. A court hearing was postponed Thursday in Katherine Kealoha's request to have a conservator appointed to act on behalf of her grandmother, who accuses her in a lawsuit of stealing her money. Kealoha sought conservatorship for her grandmother before the trial for the lawsuit got underway. Attorney Richard Diehl, the investigator appointed by the judge to evaluate the situation, says he needs more time to get up to speed. The hearing is postponed to March. Meanwhile, Kealoha returns to the witness stand Thursday in the trial where she's defending herself against her grandmother's accusations. Grandmother Florence Puana accuses Kealoha of stealing money from a reverse mortgage on Puana's home.