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John C. Schleiffarth

75 West Lockwood Avenue
Suite 250
Webster Groves, MO 63119

Phone: 314-561-9690

Website: jcsattorney.com

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About John C. Schleiffarth

John Schleiffarth is licensed to practice in both the state courts of Missouri and the Federal Courts in the Eastern District of Missouri. We offer free consultations and payment plans are available in most cases. JCS Law is a member of MACDL ( Missouri Assc. of Criminal Defense Lawyers, NACDL (National Assc. of Criminal Defense Lawyers), BAMSL (Bar Assc. of Metro. St. Louis), JRCLS (J. Rueben Clark Law Society) and the Missouri Bar. John Schleiffarth and JCS Law have been awarded a Client Distinction Award in 2013 and 2014 from Martindale-Hubbell, Avvo.com Clients Choice Awards for DWI, Bankruptcy and Criminal Defense in 2012 and 2013, JCS Law was featured in Attorney At Law Magazine in December of 2012 as “Firm of the Month” and JCS Law is Fully Accredited by the BBB with an A rating. 2014 Summer Session Graduate; 2015 Summer Session Graduate; 2016 Summer Session Graduate; 2017 Summer Session Graduate; 2018 Summer Session Graduate

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Enter your city, state, or Zip code below to locate a qualified attorney who has demonstrated a commitment to defend those accused of DUI and related crimes.

Virtual Forensic Library

NCDD members have access to a comprehensive forensic library that provides invaluable information to be used when defending clients charged with DUI.

This library includes scientific articles on drug and alcohol intoxication, toxicology and pharmacology, methods of testing for blood alcohol content, field sobriety testing, potential errors that may occur during testing, accident reconstruction, expert testimony, and evidentiary rules. This valuable information can ensure that you provide a high quality defense to clients charged with DUI based on the circumstances of their case and the laws in their state.

Virtual Forensic Library

FROM OUR BLOG

Oral Fluid Testing: Roadside vs. Evidential Analyses

09/02/2025

Written by Ashley M. Hart As cannabis is being decriminalized in many states, there has been increased interest in rapid roadside tests to detect THC and other substances for intoxicated driving charges. A majority of states now have oral fluid testing in some form: roadside (presumptive) or evidential (confirmed in a lab). These states include Alabama, Alaska, Arkansas, Arizona, California, Connecticut,...

Interview With an Amicus

06/27/2025

Written by Michelle L. Behan Amicus Curiae (Latin for "Friend of the Court") refers to a brief that is filed by an interested, non-party to the matter under consideration. This is often done in cases where organizations and entities wish to provide the reviewing court with their point of view, be it social or public policy implications, or special interest agendas....

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NCDD Member

Benefits of NCDD Membership

Members of the NCDD not only demonstrate that they are qualified DUI defense attorneys, but they have access to valuable information and resources. We provide access to documentation blood alcohol testing devices and scientific articles related to alcohol, drugs, driving, and testing.

We offer training on trial techniques and scientific testing, and we provide access to experts and a comprehensive knowledge base of cases and motions. With all of these resources at your fingertips, you will be able to win more cases

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Membership Plans

Depending on your level of experience, we offer multiple plans for NCDD Membership. Attorneys who have been practicing for less than six years are eligible for a New Attorney membership, while those who have been practicing for over six years can receive a Seasoned Attorney membership. We also offer memberships for Public Defenders.