A cash-for-marks scam has been detected in Assam in which nine people have been arrested. The men, the police say, have been conducting digital tampering of marksheets. The police stumbled on the scam during an investigation into the discrepancies in the marksheet of a student from Ganesh Lal Choudhury College, which is affiliated to Gauhati University. The police are widening the scope of the investigation as more arrests are expected.