Given the "study" was about concealed carriers, how about this:
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http://nationalinterest.org/blog/th...e-gun-owners-are-least-likely-criminals-17355
there were about 103 crimes per hundred thousand officers,” the report reads. “For the U.S. population as a whole, the crime rate was 37 times higher—3,813 per hundred thousand people.”
permit holders are convicted of misdemeanors and felonies at less than a sixth the rate for police officers,” the report says. “Among police, firearms violations occur at a rate of 16.5 per 100,000 officers. Among permit holders in Florida and Texas, the rate is only 2.4 per 100,000.10. That is just one-seventh*of the rate for police officers.
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So, it isn't ccw holders getting involved in crime. Which means that any increase in crime in those states must be due to other factors than concealed carry.