Mexico
Not unless you're from out of the country.
He searched for him in Mexico.
No. Mexico is an independent country. New Mexico was acquired during the Mexican-American War (1846-1848)
Many countries do not allow convicted felons to enter with a passport. It is best to contact the country's embassy before traveling. They will best be able to provide the legalities of traveling to their country.
A passport and depending on the visitor's country of origin, a visa.
You need a passport and an entry visa if you are entering Mexico from any country other then the US.
You always need a passport to enter another country
1949
No. Mexicans are allowed to enter the United States once the Mexican and American governments have agreed for the immigrants to enter the country legally. Any immigrants from any country are allowed to enter the United States once the government has agreed for them to enter legally.
American adopted the illegal immigration laws from Mexico. When a person or persons enter the country illegally, and are caught they are sent to a prison facility and transported back to their home country.
You only need a valid passport to enter Mexico.