http://Fwww.trulia.com%2Fcrime%2FAustin%2CTX%2F&ei=W3KkT-rPEoz0 target="_blank" rel="nofollow">http://www.google.com/url?sa=t&rct=j&q=&esrc=s&a
You might also look at FBI site for Reports or Uniform Crime Reporting. Not sure if they dump by zip code or not or MSA.
You will likely need to contact the the Austin Police Department (APD) or perhaps City of Austin's GIS department for an up-to-date data for an excel spread sheet on crime data. You may have to conduct an open records request (Freedom of Information Act or FOIA) for the data and the city may charge you a fee for processing the data.
Check out this link as it might be useful for you.
This link is on the above page and directly goes to the crime stats:
This site has some contact emails throughout it (I don't know if they still work):
Sam Trevino, Real Estate Broker