function loadOnePerson($personID)
 {
     self::openConn();
     try {
         $personDTO = PersonDAO::loadPerson($this->con, $personID);
         $phoneDTO = PhoneDAO::loadPhone($this->con, $personID);
         $addressDTO = AddressDAO::loadAddress($this->con, $personID);
         $personDTO->setPhoneDTO($phoneDTO);
         $personDTO->setAddrDTO($addressDTO);
     } catch (PDOException $e) {
         /* guarantees db con close */
         $personDTO = NULL;
     }
     self::closeConn();
     return $personDTO;
 }