At the instance of the Hon’ble High Court of Delhi, he was appointed as Amicus Curiae for the following cases:

1. Babloo Chauhan Alias Dabloo v. State Govt. of NCT of Delhi, 30.11.2017 – Crl.A. 157/2013

2. Karan v. State NCT of Delhi, [2020] DLT 352

3. Sunil Tyagi v. State Govt. Of NCT of Delhi, CRL. MC. – 5328/2013 AND CRL. MA. 19244/2013

Notably, Prof. Bajpai is credited with having evolved the concept of ‘wrongful prosecution’ in the Indian context. Based on his report on the Babloo Chauhan case, the Law Commission, in its 277th Report, proposed amendments to laws to help the victims of wrongful prosecution. His report in the case of Karan v. State also introduced the concept of a “Victim Impact Report” and the procedure for calculating and granting compensation under section 357 of the Cr.P.C. In the third case of Sunil Tyagi v. State, his report gave valuable suggestions regarding proclaimed offenders, issuing of process and attachment of property.

As a significant achievement, Prof. Bajpai worked as the ‘Co-Principal Investigator’ of the MHRD-UGC, E-PG Pathshala Project and led the creation of online e-text and video lectures on 367 modules of fifteen papers for P.G. level courses in Law. He has also completed the E-PG Pathshala Project on Criminology as Principal Investigator, where he led the creation of 350 e-texts and a similar number of video lectures for twelve postgraduate-level papers on criminology. He worked as Principal Investigator to lead the creation of Massive Open Online Courses (MOOCs) for various topics in law, where thousands of learners benefitted from these courses. Prof. Bajpai also contributed significantly to police training research. He successfully implemented a series of Vertical Interaction Courses for IPS officers and coordinated training projects with Sheffield Hallam University.

Prof. Bajpai has held many prestigious international assignments for advanced criminal law and criminal justice research. He has been to the University of Paris (France) under the UGC Indo-French Cultural Exchange Programme (1999) to work on ‘Victim’s position in the French Criminal Justice System’. He also received the prestigious Commonwealth Academic Staff Fellowship at the Department of Criminology, University of Leicester, the U.K., for advanced research and teaching (in Crime reduction) for 2003-04. Prof. Bajpai also visited the International Victimology Institute, Tokiwa University, Japan, to deliver lectures in July 2007. He was also selected under the Indo-Russia Cultural Exchange programme to visit St. Petersburg (2007) and the Indo-Hungarian Cultural Exchange Programme in Budapest (2009). In 2010, Prof. Bajpai was conferred a visiting fellowship of ICSSR under the Indo-NWO Exchange of Scholars. During this visit, he conducted significant research at the International Victimology Institute, Faculty of Law, the University of Tilburg in the Netherlands. Besides visiting the International Criminal Court at Hague, Prof. Bajpai delivered key lectures at universities like V.U. University, Amsterdam.

He was identified by the John Jay College of Criminal Justice, New York, to author a case study on ‘Bhopal Gas Tragedy’, which was published with the Cambridge Press, U.S. He made a key presentation at the Asian Law Institute Conferences held at the University of Malaya, Kuala Lumpur (June 2014), Manila (2017), Seoul (2018), New Delhi (2020) Asian Society of Criminology Conferences at Hong Kong (2018) and World Society of Victimology Conference (2019). He visited the Faculty of Law / Criminology at the University of Wurzburg, Germany, in January 2015 as a visiting professor under the German Academic Exchange Programme.

As a part of the academic collaboration, he has made significant presentations at the Centre for Criminology, the University of Oxford and the Department of Criminology & Law, Sheffield Hallam University U.K., on the issues of Post-Delhi Gang-Rape Legal Reforms and Victim Justice.