Kari Peterson

Kari Peterson

Founding Partner

Practice Areas

  • Catastrophic Injury
  • Wrongful Death
  • Trucking Accidents
  • Auto Accidents
  • Electrocutions
  • Workplace injuries
  • Premises Liability
  • Product Liability
  • Pharmaceutical & Drug Litigation
  • Dog Bites
  • Workers’ Compensation.

Kari Peterson

Contact Information

Email: peterson@osclaw.com
Office Phone: 314-696-0684
Cell Phone: 314-703-5297


Kari is a founding partner of O’Leary, Shelton, Corrigan, Peterson, Dalton & Quillin LLC. Kari’s practice includes all aspects of personal injury litigation, including: catastrophic injuries, many of which result in amputations; wrongful death claims; products claims; premises liability cases; auto and trucking accidents; all-terrain and side by side/utility-task vehicle accidents; forklift accidents; electrocution and power line cases; construction accident; workplace accidents; and workers’ compensation. Kari also engages in a national practice of representing people injured as a result of pharmaceutical and drug products in mass tort litigation.

Kari has won verdicts, awards and settlements in multiple civil jurisdictions, as well as the Missouri Division of Workers’ Compensation and the Illinois Workers’ Compensation Commission. Kari has obtained millions of dollars for clients injured by the negligence of others throughout the states of Missouri and Illinois.

Kari has successfully handled many wrongful death cases across the state of Missouri. In March of 2016, after years of litigation in Stoddard County, Missouri, she obtained $1,200,000.00 for the family of a man killed in a side by side/UTV rollover accident.

Kari often represents those that are injured in serious auto and trucking accidents.  She recently obtained $1,177,000.00 for a client and her family after a roll-over car accident caused serious injuries, including a fractured vertebra.

Kari’s clients include numerous amputees whose injuries in electrocution, powerline and manufacturing accidents caused them to lose limbs.  She has successfully resolved cases, some of which required years of litigation against numerous defendant corporations, including fortune 500 companies, for confidential settlement amounts.

Kari often represents individuals injured as a result of drunk drivers.  These cases require specialized knowledge and Kari has extensive experience dealing with the unique challenges these cases bring.  She has consistently won the battles involved in these cases, and ensured her clients successful recoveries.

Kari regularly represents firefighters, police officers, EMS personal, as well as members of numerous different unions for work injuries.  Her medical background and experience with workers’ compensation systems in both Missouri and Illinois regularly produces excellent results for her clients who are injured on the job.

In 2015 Kari was named a Missouri Super Lawyer which represents the top 5% of practicing lawyers in the state. She was given this honor again in 2016 as well as 2017.  In 2014 Super Lawyers named Kari a Rising Star, a distinction granted to less than 2.5% of the attorneys in the state. The Super Lawyers selection process has a patent (U.S. Pat. No. 8,412,564) from the United States Patent and Trademark Office. This distinction is relevant to both attorneys and consumers, as it demonstrates Super Lawyers credibility as an impartial third-party rating system. Kari has also been repeatedly listed in KC Magazine as a Top Attorney for Plaintiff’s Personal Injury.

Kari has been named one of the Top 100 Trial Lawyers in Missouri by The National Trial Lawyers, a professional organization composed of the premier trial lawyers from across the country who exemplify superior qualifications of leadership, reputation, influence, stature and profile. In addition, she was named one of the Top 40 Under 40 Litigation Lawyers in the State of Missouri by the American Society of Legal Advocates, an invitation only organization whose members must not only have stellar legal credentials, but also have proven commitment to community engagement, leadership, and the highest professional standards.  In addition, Kari was given the Client Distinction Award by Martindale-Hubbell, which granted in recognition of an attorney’s dedicated service to their clients and awarded to less than 1% of the lawyers in the United States.

In 2004 Kari was appointed to the Missouri Bar’s Workers’ Compensation Committee which consists of Judges and attorneys across the state. The Committee’s purpose is to study the law and develop legislative proposals, as well as publish educational materials and present programs about current trends in the law. Due to Kari’s knowledge of the workers’ compensation system she has been asked to speak on the topic and has given lectures to other lawyers at Continuing Legal Education seminars.

Kari also serves on the Board of Kids’ Chance, Inc. of Missouri. Kids’ Chance is a not-for-profit organization which provides scholarships to children of workers killed or disabled on the job. In addition to being on the Board, Kari is a long-standing member of the Scholarship Committee, where she reviews applications for scholarship approval.

Kari was raised in St. Louis.  She comes from a medical family with numerous physician family members.  Both her father and grandfather had medical practices in the St. Louis area, and her father was the Chief of Family Practice for a hospital system in St. Louis. Kari’s brother is also a physician. Kari utilizes these resources in representing her clients involving serious and catastrophic injury.

Despite having numerous physicians in her family Kari choose a different path and attended law school at the University of Missouri- Kansas City. While in school she was an Editor for The Urban Lawyer Law Journal, authored an article for publication, received an American Jurisprudence Award, recognition for her student leadership and made the Dean’s List. After graduating Kari practiced law with a multi-state defense firm in both its Kansas City and St. Louis offices. This experience gave her firsthand knowledge of the strategies that insurance companies, and their lawyers, utilize to defend and deny claims of those that are injured.  Kari soon realized her true calling lay in representing people hurt by the negligence and wrongful actions of others and has done the same since 2002 when she became a founding lawyer in a St. Louis area law firm.  Since that time Kari has used the knowledge she gained as a defense lawyer to help her clients in their cases.

Kari is licensed to practice in Missouri, Illinois and Kansas and is admitted to the Eastern and Western District of the Missouri Federal Courts. She is a member of the American Bar Association, the Bar Association of Metropolitan St. Louis, the Missouri Association of Trial Attorneys and the American Association for Justice.

Kari lives in St. Louis with her husband, who is also an attorney, their son and the family dog.