Earlier quoted context omitted.
India's Caste System is very rigid, apparently. I asked an Indian friend in college to explain it to me before the interwebz. After the rage she showered upon me for asking I never followed up. Perhaps I will now... https://en.wikipedia.org/wiki/Caste_system_in_India
Caste system is not the same as Racism. However, it has nothing to do with accidents. When you see a person involved in an accident in India you won't be able to make out his/her caste by looking at them (unlike race where the racial features are apparent).
Is it on your ID card? Can you tell via their accent? Is there anything stopping someone from moving to a different city and pretending to be a different (better?) caste?