I don't know if you can read Spanish, Kellysan, but here is a link to a list of towns with the highest percentage of break-ins in Puerto Rico as of Q1 of 2011:
(Google Translator is not too bad if you need it translated.)
Unfortunately, many country towns/areas suffer from high rates of property crime. My story about the cop and the poisoned dog did not take place in the metropolitan area or on one of the smaller islands such as Vieques, where property crime is now epidemic.
The criminal justice system here is in shambles. Crimes are rarely solved and even when they are, the outcome is nearly always entirely inadequate. This results in a high percentage of repeat offenders (of even violent crimes) free to wreck havoc on the general population. If a murder is not due to domestic violence, it usually goes unsolved. Likewise, even burglars that get caught usually get off with a slap on the wrist and are soon back to their work. Criminals act with a sense of impunity, which is logical under the circumstances.
As always, adolfojp makes good points in his comment. For example, I continue to live here in spite of this situation. Life goes on. But I strongly caution you: Don't underestimate the role that crime plays in affecting the quality of life in Puerto Rico.