My brother who is from Bangladesh got deported from the UK back in 2009 for working illegally while being a student. His old passport was not machine readable.
Since then he has obtained a new clean machine-readable passport (no record of previous visas) and visited countries like Thailand, Singapore, India, Malaysia. He is now planning to visit the US to attend my college graduation.
If he checks the box to say that he was never deported from any countries, is there any way they can find out about this?