I think you may be selling yourself a little short.
The three schools you listed are closer to be safeties for you. The thing is, if you're really interested in management consulting, keep in mind that they focus their MBA recruiting on the top 16 schools. Doesn't mean you can't get into consulting from the more regional schools, but it's like sports: going to a D1 school as that is where the pro scouts spend most of their time looking at prospects.
This may be a stretch for you, but you should go for it if you are truly serious about making a career switch:
Stretch: HBS, Stanford, Wharton, Kellogg, Sloan, Tuck (choose 2-3)
Sweet spot: Duke, Darden, Michigan, Yale (choose 3).
In my view, you should go big rather than selling yourself short, especially if mgmt consulting is what you want to do. Otherwise, I think you're better off doing a part-time program at a regional (instead of full-time), if that is at all possible given your line of work. In other words, these regional programs on a full-time basis may be able to get you *out* of law enforcement, but it won't get you *in* to management consulting (but it can still allow you to transition to a business career - maybe working in industry in Texas).
There's no doubt that you have a ton of leadership experience, and life experience that few if any applicants have. Age can be an issue but there's nothing you can do about that. Again, I think you have enough of an outside shot that it's worth at least giving these top schools a go.
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