John C. Martin's practice is devoted to complex litigation. He has substantial expertise with both business disputes and fiduciary claims (including common law, ERISA, and attorney professional responsibility matters) with clients ranging from individuals to multinational corporations. Representative matters include:

• Representation of a Chicago area bank in connection with common law and statutory fraud claims brought by a defaulting borrower.
• Defense of a Milwaukee area financial institution in regulatory, class action, and individual proceedings brought following a restatement of the company's financials.
• Representation of a land developer in cases involving claims of ERISA violations and business torts arising out of a sale of property to a union pension trust.
• Representation of a Fortune 100 company in suits brought against distributors, including spearheading successful constitutional challenges to distributor-protection legislation.
• Defense of a community group being sued by the United States governmental entity under the False Claims Act.
• Representation of a California printing company in commercial fraud suit against a printing press manufacturer.
• Ongoing pro bono representation of a death row prisoner in habeas corpus proceedings challenging the fairness of his conviction and death sentence.