SANTA MARIA, California (CNN) -- A former security supervisor at Michael Jackson's Neverland Ranch testified Monday she never saw the pop star exhibit any illegal or improper behavior toward young boys. The supervisor, Violet Silva, also admitted she could not get into Jackson's bedroom suite unless it had been unlocked from the inside. Under cross-examination by the prosecution in Jackson's trial on child molestation charges, Silva conceded there were "some occasions" when boys stayed alone with the entertainer in the main residence. She said security staff generally went into the house only when summoned. Silva said that based on her...