[citation needed] Prasad began his career by enrolling as an Advocate on 27 November 1973 with the Bar Council of Bihar.
He practiced in civil, constitutional, criminal, and service matters at the High Court of Judicature at Patna, Bihar, and was designated as a senior advocate on 17 July 1989.
Prasad is the revising author of the 22nd edition of the legal classic Ratanlal and Dhirajlal – Code of Criminal Procedure along with Advocate Namit Saxena.
He is also the revising author of the 19th edition of Mulla – Code of Civil Procedure along with Justice Deepak Verma and Advocate Namit Saxena.
As a champion of civil liberty, in Arnesh Kumar v. State of Bihar [(2014) 8 SCC 273], Prasad gave a landmark ruling and very strongly pointed out the blatant misuse of the Sec.498A of IPC in India.
In Vishwa Lochan Madan v. Union of India [(2014) 7 SCC 707], a bench led by Prasad held that fatwas and Shariat court decisions were not legally enforceable.
Ajmal Amir Kasab v. State of Maharashtra [(2012) 9 SCC 1], Prasad affirmed that the conspiracy for the terrorist activity was hatched certainly in Pakistan while carving out an exception for the settled principle of ‘certain probability’ in criminal jurisprudence.