Authorities said photo and video evidence of the alleged sexual misconduct were found on a cellphone belonging to Dr. Steven Cogswell.
The crowd in Amritsar was watching the burning of an effigy of demon Ravana near the tracks when the train went roaring by.
It's now the second biggest lottery in U.S. history, trailing only a 2016 Powerball prize that reached $1.58 billion.
"If migration and the federal police do not allow us access, we will do the impossible to cross into Mexico," one migrant said.
No one has been reported sick because of the potential contamination.