Wagstaffcartmell.com

Wagstaff & Cartmell | Criminal Defense and Complex Litigation in Kansas City, Missouri (h1)

Wagstaff & Cartmell maintains its primary office at 4740 Grand Avenue, Suite 300, Kansas City, Missouri 64112, with a second location at 1717 K Street NW, Suite 900, Washington, D.C. 20006. The firm can be reached at 816.701.1180. Partner John P. O’Connor anchors the firm’s criminal defense practice, handling matters that range from complex criminal litigation and white-collar investigations to violent felony charges across Missouri and Kansas federal and state courts.

O’Connor’s caseload has included first- and second-degree murder, armed criminal action, assault, drug distribution and possession, fraud and financial crimes, and DWI matters involving vehicular manslaughter, along with corporate criminal investigations that draw on the firm’s broader litigation resources. That range allows the firm to move between white-collar defense work, requiring forensic review of financial records, and violent-crime cases that demand fast, evidence-focused trial preparation.

O’Connor has been named to Best Lawyers in America for criminal defense every year from 2005 through 2026, including a 2013 “Lawyer of the Year” honor for non-white-collar criminal defense, and holds an AV Preeminent rating from Martindale-Hubbell along with a two-decade run on the Kansas City Magazine Super Lawyers list. He is admitted before the Missouri Bar, the U.S. District Courts for the District of Kansas and the Western District of Missouri, the Eighth Circuit Court of Appeals, and the U.S. Supreme Court, a credentialing record that reflects the firm’s standing at the top of Kansas City’s criminal defense bar.

Address: 4740 Grand Avenue, Suite 300, Kansas City, MO 64112

Phone: 816.701.1180

Website: https://wagstaffcartmell.com/attorneys/john-p-oconnor/