I so love real science...
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1131883
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1131885
http://www.sciencedaily.com/releases/2004/11/041118104010.htm
Now your mind is much greater than mine, but it seems to me the main facts are that a very small population can account for the DNA, perhaps as small as 70 individuals, and that it appeared here many thousands of years before the Lehites/Nephites would have gotten here.
Now if you have some independent NON LDS science that can dispute this in a believable fashion, I am all ears. As it is, the Hopewell Indians were very industrious and successful in their own right.
Game, set, and match ... Checkmate ... And he Scores! But be ready, the mormonism apologists are big on that river in Egypt don’tchaknow. They don’t need no stinking scientific facts.