you likely mean the clovis people who are likely to have come to the americas from what is today's france - comparing spear tips, those are quite alike to those in europe. Clovis people were quite wide-spread in the north america's southern parts, but they ended their exitance most likely at the end of the ice age, when ice returned a second time in northern america - well,that was a difficult time anyway, all that melting water led to massive flooding and flash flooding - somewhere there the clovis people found their end.