Statistics are useful for tracking by police departments, but they can be misleading. The overall rate is about 10 percent higher in Longmont and then Florence is supposed to have a crime rate higher than the rest of the state. Boulder and Castle Rock, which have very few incidents, may skew the numbers.
If you're looking at Florence, you should probably ask a local agent to provide stats and give you their take. They also could give you a rundown on why it seems there are many homes for sale cloistered in one area.
I would direct this question about the crime rate to the local sheriff and police departments. Maybe it lies within their failure to prevent crime and locals know they have a weak law protection force between the two departments and take advantage of this. Direct this question also to the county commissioners and mayor of the town and county. They should be answerable to the public on these types of questions and concerns. The elections are coming up to vote in a new Sheriff and maybe that can help if a new psychology is used to enforce the law in this area.
As far as homes for sale in such a close proximity to each other, it could be possible if it is in one particular subdivision you are speaking of, there may be issues you can discover by obtaining the last 2 years HOA meetings minutes and last year of monthly board meeting minutes and do some research ahead of buying in an area you suspect something is wrong. Sometimes there could be a special assessment that may be in the works and not voted on yet or just the economy has hit this area harder then other areas in our state. There are many variables that can affect why many homes may be on the market all at one time. Good Luck.
You can ask yourself to the residents of the area from forums, here is a good website http://www.city-data.com that you can discuss.
Hope it helps!