First off, don't ask a police officer for legal advice. Sadly, a significant number of them do not know the laws they are sworn to enforce.
Second, welcome to OCDO and the Mississippi sub-forum. Take a look at the last page or two of threads, there has been some good discussion on the ins and outs of OC in MS.
Third, there's some uncertainty on exactly which laws (or lack of laws) apply to OC. I've tried to summarize the issue before - maybe this will help you. http://forum.opencarry.org/forums/sh...=1#post1437380
Given the lack of actual legal knowledge among some LEOs, it is entirely possible you will get "hammered" for OCing, depending on when and where you do it. But regardless of whether OC is viewed as "concealed in part" (see link above), if you are on your own property or in your car, or you have your MS concealed carry license, you're covered legally.