Every intending expat needs to know something about the crime situation in his intended home. My blog contains several posts about crime in Cayman. The archives of January, March and July 2011 include commentaries on the topic; you can tell the subject-matter by the titles, pretty much.
Crime is by no means rampant, by Caribbean and regional standards, but it is serious enough by Cayman's past standards. We are averaging about one armed robbery a week, this year. Even our Tourism Department no longer advertises us as crime-free.
Once you've read the blog, you might have questions.
Update June 2012. My latest blog-post is called Locking the doors and windows, which is self-explanatory. In retrospect, my above posting probably understated the danger posed to residents by amateur criminals armed with guns. Expats coming to Cayman should not be under any illusions with regard to crime. It's not what one would call a lawless place, but it's not all peace and love, either.