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Former AT&T Counsel Charged for Leaking Privileged Info to Whistleblower

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Why it matters

Theodore Marcus, a former senior in-house attorney at AT&T, has been charged by the District of Columbia Office of Disciplinary Counsel with violating professional conduct rules by disclosing confidential and privileged information to a whistleblower plaintiff suing the company. The allegations center on Marcus sharing sensitive company data with opposing counsel and the plaintiff in federal court cases in Washington, D.C. and Wisconsin while seeking a financial stake in the litigation. The underlying dispute involves claims that AT&T systematically overcharged schools and libraries for internet access under a federal discount program—allegations Marcus reportedly raised internally before the company continued the practice.

The formal ethics complaint was filed in June 2026. The specific details of Marcus's disclosures and the scope of privileged communications at issue remain unclear. It is also uncertain whether Marcus will contest the charges or what disciplinary outcome the D.C. Office of Disciplinary Counsel may pursue.

Attorneys should monitor this case closely as it tests the boundaries between whistleblower protections and attorney confidentiality obligations. The charges highlight a critical tension: former employees with knowledge of corporate misconduct face substantial professional liability when sharing privileged information, even when motivated by legitimate compliance concerns. For in-house counsel, the case underscores the risks of internal dissent and the limited protections available when leaving a company. For outside counsel representing corporations, it reinforces that privilege waivers by individual former employees do not bind the company itself. The outcome may influence how future whistleblower-attorney relationships are structured and what safeguards are necessary to protect both disclosure and professional standing.

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