Ssh break that claims it was me?

[makkalot () gmail com]

Hi all i dont know if it is the right place to write that but didnt know what 
to do...
The case is as follow : 
I'm a freelancer programmer and work for other people from distance,therefore 
they give me ssh access to their servers and i fix their stuff. After a few 
days ago i was hired to fix some django/apache stuff in a server. I fixed all 
the stuff and got my money.Ok that was the story part here is the message i 
got from client today :
"
I know you deleted the svn repo and also trac...
I don't know why you chose to go in that route... very bad
if you were not happy about something you could have 
asked for more money... we could have worked together
to resolve anything... in any case.. I will report this to RAC
form the system logs and we will go from there... 
I still don't know why you did this!!!! "

Ok obviously i didnt do that, becaus i dont have any reason to do so. Is there 
a way i can prove it wasnt me ? Some fingerprint ssh values? Please any help 
is appreciated, thanks in advance ...

------------------------------------------------------------------------
This list is sponsored by: Black Hat USA

Attend Black Hat USA, August 2-7 in Las Vegas, the world's premier technical event for ICT security experts. 
Featuring 40 hands-on training courses and 80 Briefings presentations with lots of new content and new tools. 
Network with 4,000 delegates from 50 nations. 
Visit product displays by 30 top sponsors in a relaxed setting.

www.blackhat.com
------------------------------------------------------------------------