Special Judge O P Saini observed that the CBI had started its case with "great enthusiasm and ardour" but at the final stage of the trial, SPP Grover and the regular CBI prosecutor moved in "two different directions without any coordination".
It would be pertinent to mention that at the start of the case, the top court had appointed senior advocate U U Lalit, now a Supreme Court judge, as the SPP in the 2G case.
Later, when Mr Lalit was appointed as a top court judge, the top court had appointed Mr Grover as SPP to present the case of both the CBI and ED before the special court.
"In the beginning, the prosecution started with the case with great enthusiasm and ardour. However, as the case progressed, it became highly cautious and guarded in its attitude making it difficult to find out as to what prosecution wanted to prove," the court said in its 1,552 page verdict in the CBI's case involving former telecom minister A Raja and others.
"However, by the end, the quality of prosecution totally deteriorated and it became directionless and diffident. Not much is required to be written as the things are apparent from the perusal of the evidence itself," the court said.
It also took strong note of behaviour of CBI and its SPP saying several applications and replies were filed on their behalf but in the final phase of the trial, no senior officer or prosecutor was willing to sign these documents.
The documents were ultimately signed by a an inspector of the agency, who was one of the junior-most officers posted in the court, the judge said.
"When questioned, the reply of the regular senior PP would be that the Spl. PP would sign it and when the Spl. PP was questioned, he would say that CBI people would sign it," the judge noted.
"This shows that neither any investigator nor any prosecutor was willing to take any responsibility for what was being filed or said in the court," the court said.
The court further noted that when final arguments in the case started, SPP Grover had said he would file the written submissions but later, he started arguing the matter orally which went on for several months.
"On conclusion of final arguments for the prosecution, he (SPP) did not file written arguments, but instead submitted that he would file it only when the defence would file its written arguments. That was highly unfair," it said.
"The final arguments for the defence started and they kept filing their written submissions contemporaneously with their oral submissions. When the rebuttal arguments started only then the prosecution started filing its written arguments on day-to-day basis, apart from making oral submissions," it noted.
The court rued the fact that the insistence on filing of CBI's written submissions after accused do the same led to a situation where defence counsel were given extra time to rebut the allegations.
"Not only this, the most painful part is that Spl PP was not ready to sign the written submissions filed by him," the court said, asking, "What is the use of a document in a court of law, which is not signed by anyone? When questioned as to why the Spl. PP was filing unsigned written submissions, his reply would be that some defence advocates had also not signed the written submissions".
The court said that despite its persuasion, Mr Grover refused to sign the CBI's written submissions.
"Many more things can be said but that would only add to the length of the order," the court said.