Modi worked with the Central Bureau of Investigation (CBI) for a period of around 10 years in two stints (2002-2010 and 2015–2017) where he handled Special Crime and Economic Offences besides Anti-Corruption cases.

In the States of Assam and Meghalaya, he was posted as SDPO, Distt S.P., DIG(Range) and Additional Director General of Police (Law & Order).

A Division Bench comprising Justices Arun Mishra and Vineet Saran overturned the High Court's judgement and observed, "The CBI has investigated the case thoroughly and minutely and the conspiracy between accused persons has been found established.

There is voluminous evidence discussed in criminal appeals decided today vide separate judgment with respect to the complicity of the accused persons in the offence.

It cannot be said that investigation was unfair, lopsided, botched up or misdirected in any manner whatsoever, as had been observed by the High Court in the judgment which we have set aside...The observations made by the High Court in the judgment which we have set aside were based on lopsided approach without consideration of the entire evidence on record and on the wholly incorrect appreciation of the evidence which was clearly perverse.