Whistleblower David Danon affirmed in court filings last week that Vanguard Group attempted to silence him before eventually firing him “in retaliation for my persistent and vocal questioning” about what he claims was undercharging for services to its mutual funds that amounted to the avoidance of $1 billion in taxes.

Danon, a Wayne resident, also revealed that another company tax lawyer shared similarly “deep concerns” before that attorney left “due to professional harm from airing these concerns,” according to Philly.com’s report on the latest documents, and Danon defended himself against Vanguard’s claim of betrayal and abuse of attorney-client privilege by clarifying that he didn’t represent the Malvern mutual fund giant in the matters upon which his lawsuit is based.

Danon lawyer Stephen Sorensen compared Vanguard’s claim that Danon owed his employer the loyalty and secrecy due from a trusted professional counselor to an organized crime gang’s ‘code of silence,’” the article stated. “To the contrary, he argued, Danon had an ‘obligation’ to expose and denounce illegal activity when the company wouldn’t stop it.”

Read more about Danon’s latest response to the volley of allegations surrounding his whistleblower lawsuit on Philly.com here, and check out previous Vista.Today coverage of the saga here.