A friend of mine is a LEO in Chicago (SWAT) and when I asked him about concealed carry his answer was something that struck me as very true and I hope you deem it worth sharing.
He said that his job is not to protect us from threats that MAY happen but to protect from those who are known to pose a threat and to RESPOND to threats. If he needs to respond then it is most likely to late for the victim. That is what makes a victim! Unfortunately for those living in the wonderful state of Illinois you really don't have many options for personal protection.
He also said that basically EVERY LEO he know wishes the law abiding citizen in his state had the right legalized to carry...he said it would make his job much easier and safer...I find this interesting and encouraging.