What measures have been put in place to stop the disturbing trend of the theft of and/or missing police firearms as approximately 26 025 police firearms were either stolen and/or could not be accounted for between 2005 and 2017 and 3 405 official police firearms were stolen and/or went missing in the past five financial years and (b) what has he found to be the reasons that he and his department fail to get the situation under control?