The judge ruled that there was no "prima facie" evidence against the accused which could be converted into legal evidence. Those freed included Bharatiya Janata Party president L. K. Advani; former Union ministers V. C. Shukla, Arjun Singh, Madhavrao Scindia, N. D. Tiwari and R. K. Dhawan, and former Delhi chief minister Madan Lal Khurana. In 1997 a ruling by late Chief Justice of India J. S. Verma listed about two dozen guidelines which, if followed, would have ensured the independence of the investigating agency. Sixteen years later, successive governments circumvent the guidelines and treat the CBI as another wing of the government. Although the prosecution was prompted by a public-interest petition, the cases concluded with no convictions. In "Vineet Narain & Othrs v Union of India AIR 1996 SC 3386", the Supreme Court ruled that the Central Vigilance Commission should have a supervisory role over the CBI.