Another piece of advice;
if you don't get accepted at the first place you apply for don't worry about it. Just keep plugging along and keep applying. If turned away, call the HR rep and ask them why and then do what you can to straighten out the concerned area.
Sometimes they will choose a more qualified applicant, sometimes, it will be because someone was just liked better, and sometimes, the L.E.O. will be looking to fill a quota.
I applied at 3 different L.E.O.s before I found the right fit.
Bottom Line: if it is something that you are determined to do; don't get discouraged...
It's ironic that I am going to retire in a few years and go into the nursing field and you are leaving the nursing field and going into law enforcement.