US Citizen held for 17 days and almost deported

A US Citizen from Texas was detained in Michigan suspected of being an illegal alien because he was working as a migrant worker and looked Mexican. 

How many US citizens carry with them their birth certificate or passport?
Do you feel that you have to carry proof of your citizenship when traveling inside your own country????
If you do, please let me know why

This guy didn’t and he spent 17 days in jail:

For 17 days he was chained, jailed and threatened with deportation to Mexico. For 17 days Brigido Oregon, a West Michigan migrant farm worker from Texas, pleaded his innocence.

On the 17th day, U.S. Immigration and Customs Enforcement officials confirmed he, indeed, was a U.S. citizen, and allowed him to leave jail.

You can read the whole article from the Muskegon newspapper here