samba - Jun 2004 - Problems with Samba users, need to collect hard evidence

I am having some problems with some samba users of my company, latelly some
files have been erased as some others have showed up in diferent locations of
the samba directory on linux server.

I have been trought the user logs, but unfortunatly they do not provide hard
evidence on files deletion and/or user/file interaction.

Can someone point me out something, either a samba capability or tool to be able
to gather and know who is deleting what file/files ? and/or moving files to
diferent locations ?

Thank you 

JT