Costello Law Firm, PLLC Email Format

Law PracticeWashington, United States11-50 Employees

Costello Law Firm, PLLC is a Seattle-based law practice that represents corporations, business owners, and professionals facing government scrutiny or litigation. Drawing on nearly three decades of experience working with government investigators and prosecutors, the firm aims to resolve these high-stakes matters through discreet, efficient, and principled handling. The practice covers white-collar matters, including complex grand jury investigations, government investigations, and trials in state and federal courts.

The firm also handles civil and regulatory enforcement actions and professional licensing issues at federal, state, and local levels, as well as complex litigation involving quasi-criminal civil allegations and concurrent or parallel investigations across criminal, civil, and regulatory venues. With a mid-sized team, the firm serves clients navigating government-facing proceedings from its Seattle base and across applicable jurisdictions.

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