When Maxsted insisted whistleblowers were "treated with respect" and that there were "good processes in place", Gocher replied: "I don't think anyone in this room believes you."
The steady line of questioning has been met with short responses from Maxsted, with the shareholders jeering each dismissive reply and cheering every pointed question levelled at the board.
"You're just showing your incompetence every time you open your mouth," one investor yelled from the near-packed theatre at the International Convention Centre in Sydney.
Nearly two hours into the forum's dedicated discussion on the Austrac investigation, shareholders are still lining up to hurl their disgust and confusion at the basis of the child exploitation scandal.
Westpac's crisis began when financial watchdog Austrac revealed last month it was facing charges after allegedly failing to investigate customers who made transactions possibly linked to child exploitation in the Philippines and South-East Asia.
According to the Australian Financial Review, some of those payments may have gone towards "live-streamed child abuse".
The lender is also accused of breaching money laundering and counter-terrorism finance laws, with Westpac publicly accused of 23 million breaches in total.
It has cost the bank dearly, with shares 1.03 per cent lower at A$24.13 earlier today, after slipping 9.1 per cent since the Austrac allegations were aired last month.
That's wiped about A$8.7 billion from the company's market capitalisation.