A WATSONVILLE MAN ACCUSED OF SEXUALLY ABUSING A YOUNG GIRL WILL UNDERGO A MENTAL COMPETENCY HEARING BEFORE STANDING TRIAL. 53 YEAR-OLD JOHN CHARLIE DEANDA SCORED LOW ON INTELLECT TESTS, AND HIS DEFENSE ATTORNEY SAYS HE COULD BE INCOMPETENT TO STAND TRIAL BECAUSE OF HIS LOW SCORES. DEANDA IS DUE BACK IN COURT SOON TO SET A DATE FOR THE COMPETENCY HEARING.