Christopher's practice primarily focuses on securities regulation, compliance, and litigation, as well as internal investigations and white collar defense.Christopher frequently represents banks, broker-dealers, investment advisers, boards of directors, corporate officers, financial advisors, and other securities professionals in connection with internal investigations and inquiries by the U.S. Attorney’s Offices for the Southern District of New York and Northern District of California, the SEC, the CFTC, FINRA, the IRS, the FRB, the NY Department of Financial Services, and other governmental entities and self-regulatory organizations. He counsels clients in connection with issues and allegations pertaining to insider trading, trading and position valuation, misuse of confidential information, unauthorized trading, money laundering and BSA/AML issues, retail brokerage sales practice violations, criminal and civil tax violations, and legal challenges posed by emerging technologies. Christopher has advised financial institutions on compliance with data privacy and cybersecurity legal mandates, represented a blockchain investor in connection with shareholder derivative and class actions alleging securities law violations, advised firms regarding digital token issuances and regulatory compliance, and regularly publishes on regulatory developments in the cybersecurity, blockchain, and cryptocurrency spaces.Christopher represents organizations and individuals in connection with a wide variety of litigation, including grand jury and regulatory enforcement matters, as well as RICO, breach of contract, fraud, intellectual property infringement, and shareholder actions.Christopher is actively involved in pro bono work at the firm, including the representation of individuals seeking asylum in immigration proceedings.