MISSING OLMEC ELEPHANT

The Olmecs were older than the Mayans and Aztecs, perhaps as ancient as 3000 b,c,e.  The fact that this elephant was found in the ruins of an Olmec settlement and displayed at the Jalapa Museum in Vera Cruz province,  is important in understanding the African Mexican connection. Historian Secharia Sitchin states in his book, Lost Relmn, that this clay toy was on exhibit until it disappeared in 1999. Why would an elephant be found in Mexico unless someone had seen one? Why are there colossal stone heads with Nubian features found all over southern Mexico? When did Africans come and what did they do in the western hemisphere?