Windows 2012 Conputer account Deleted

Auditing is not turned on by default, so unless you had previously configured it, no. That information is not logged or tracked. And since you are asking, it is usually a safe conclusion that auditing was never configured.

Have you enabled 2012 Ad Recycle Bin?  If not, do so for future issues.
Plenty of articles on how to do this, for example:
http://blogs.technet.com/b/canitpro/archive/2013/04/10/step-by-step-enabling-active-directory-recycle-bin-in-windows-server-2012.aspx

Let me understand other than using windows Audit there is not other way of tracking who deletes a computer in AD?  EX PowerShell?

I had auditing for users turn on but did not for computers.

I plan on Moving the  function level  of the domain to windows 2008 R2 soon so I can turn on Recycle bIn for AD.