I know you're only trying to help, but they look nothing alike. And going missing on a shrimp boat leaving Texas, to then hike from up north seems too odd for Occam's Razor.
Secondly, his DNA didn't match the missing person's database, which you are getting your "match" from.
There's no reason to be defensive. You've done nothing wrong. Wrong starts only if it is impossible for one to accept that one's theory might not be correct. That can ultimately end in throwing off the real investigation, if one were aggressive enough.