The Crown Prosecution Service (CPS) tore into the evidence provided by a political expert deposed by Vijay Mallya's defence, claiming that he had relied on flawed material to discredit Indian investigation agencies like the CBI and Enforcement Directorate (ED).
Mallya's extradition trial opened yesterday on day five at Westminster Magistrates' Court here with Lawrence Saez, a professor in the Department of Politics at the School of Oriental and Asian Studies (SOAS) in London, taking the stand.
Saez gave his expert opinion on the Indian political system as part of which he called into question the impartiality of the CBI and the appointment of its special director, Rakesh Asthana, in particular.
The defence is going through a series of expert witness statements to establish that there are no grounds to force the UK-based tycoon to return to India to face allegations of fraud involving his now-defunct Kingfisher Airlines.
Mallya's counsel Clare Montgomery took Saez through his written statement, which relied on a past Supreme Court of India ruling to describe the CBI as a "caged parrot speaking in its master s voice" and also memoirs of past CBI directors which detailed ways in which their investigation could be "interfered with".
CPS barrister Mark Summers, arguing on behalf of the Indian government, took him to task on this aspect, stressing that the 1997 Supreme Court judgement he had quoted from had resulted in the creation of the Central Vigilance Commission (CVC), which has "independent oversight over the CBI".
"The commission does not feature anywhere in your report evaluating CBI s independence," Summers rebuked, also pointing to the annual report of the Indian Ministry of Personnel, Public Grievances and Pensions, which describes the CBI as a trustworthy "premier investigation agency" of the country.
He sought to discredit Saez's views in their entirety for not taking into account such sources and instead relying heavily on Indian press reports, including those claiming the appointment of Asthana as CBI special director was politically motivated.
"You make a broad attack on the CBI and raise serious allegations about the character and professional integrity of its director, Asthana. People take experts like you seriously and would assume that you would not regurgitate press reports while evaluating your information," Summers said.
Summers referred to a Supreme Court order dated November 28 which had ruled that Asthana's appointment as CBI special director "suffers from no illegality" and that the news reports in the Indian media which had raised doubts about its legality were "factually incorrect".
Saez insisted that though the court had "exonerated" Asthana, he stood by his view that there remain "serious issues regarding the independence of the CBI as a whole" and that he had only relied on news reports from highly regarded newspapers in India.
As part of his witness statement, he claimed that 61-year-old Mallya is being "unfairly persecuted on account of his high profile corporate persona" and being "unfairly targeted" by political parties trying to lobby for political gains against each other.
"He is a prominent businessman and my contention is that both the BJP and Congress used this case for their own political gains to blame each other," Saez said.
His witness statement was followed by the second-half of the cross-examination of Paul Rex, the banking expert deposed by Mallya's defence team last week.
Summers sought to establish that Mallya had misused the loan he acquired from IDBI for purposes other than those specified, but Rex's assessment was that most of the transactions fell under general corporate purposes of Kingfisher Airlines.
Judge Emma Arbuthnot yesterday directed the CPS to clearly lay out its case in its closing submissions because she feels "very uncertain" about how the Indian banks are involved in the wider case of "conspiracy" involving Mallya.
With tomorrow marked as a non-sitting day, the defence will depose its final expert witness Dr Alan Mitchell on Indian prison conditions and both sides are expected to present their summary statements on the case by Thursday.
The judge will determine the course of the closing arguments and a date for her ruling by December 20, which is now marked as the last day of the trial when arguments around "admissibility" of some of the evidence presented by the Indian authorities will be taken up.