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Joseph P St Louis

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Contact Information

Nesci & St Louis
216 N Main Ave, Tucson, Arizona, 85701-7202




Status: Active  

Board Certified Specialization: Criminal Law  

Professional Liability Insurance: Yes  

Admitted to Practice Law: 1987

Admitted to State Bar of Arizona: October 24, 1987

Other Language(s): None


Joseph P. St. Louis is the only lawyer in Arizona certified as a Specialist in both Criminal Defense (Arizona State Bar, 2000 to present) and in DUI Defense (National College for DUI Defense, a certification recognized by the American Bar Association, 2012 to present). Mr. St. Louis is AV ® PreeminentTM Peer Review Rated by Martindale-Hubbell® and is listed in Woodward/White’s Best Lawyers in America in the DUI specialty area. He has been named to the Best Lawyers in Arizona by Super Lawyers magazine in the DUI specialty area since 2009, and has been named one of the Best Lawyers in Tucson in the DUI specialty area by Tucson Lifestyle Magazine.

Mr. St. Louis is one of eleven members of the governing board of the National College for DUI Defense, the Board of Regents. The NCDD has over 1,400 members nationwide. Mr. St. Louis is also the past president of Arizona Attorneys for Criminal Justice, a statewide defense organization with over 800 members. In 2003, at the request of the then-presiding chief judge of the Pima County Justice Courts, Mr. St. Louis served as a part-time Justice of the Peace. In 2013, Mr. St. Louis was one of four lawyers who litigated a 17-day hearing in the Maricopa County Superior Court challenging the manner in which blood testing is performed in the Scottsdale City Crime Laboratory. The hearing resulted in the trial court judge suppressing all blood evidence in 11 felony cases, after finding the results to be unreliable.

Mr. St. Louis is a frequent speaker on legal issues, and has spoken on a variety of legal topics at legal education seminars sponsored by a variety of State Bar and Defense Attorney organizations in Arizona, California, Colorado, Florida, Georgia, Illinois, Louisiana, Massachusetts, Mississippi, New Mexico, New York, Nevada, Ohio, Oklahoma, Tennessee, Texas and Wisconsin. Mr. St. Louis is a graduate of the National Highway Traffic Safety Administration (NHTSA)’s Student Course on Standardized Field Sobriety Testing, NHTSA’s Instructor Course on Standardized Field Sobriety Testing, and the American Chemical Society’s Forensic Chromatography Course.

Mr. St. Louis has defended several death penalty cases, both in state court, where he was lead counsel in Pima County’s first death penalty case tried completely to a jury (the client received a prison sentence after Mr. St. Louis convinced the jury not to impose the death penalty) and in federal court, where he was found to be qualified as “Learned Counsel,” a designation reserved for only the most qualified attorneys handling these cases. Mr. St. Louis has the unique distinction of having had two back-to-back first-degree murder cases in which the judges dismissed all murder charges during trial.

Mr. St. Louis has tried over 200 cases to juries, on both misdemeanor and felony charges, in federal court and in state courts throughout Arizona. He has also argued cases before the Arizona Court of Appeals, the Arizona Supreme Court, and the Ninth Circuit Court of Appeals.

Mr. St. Louis is the attorney coach for the Basis Oro Valley Mock Trial team, which placed in the top 4 in the state (including 2nd place) the last two years.

Areas of Law and Practice

Areas of Law Areas of Practice
Criminal Law Hit and Run, Homicide, Habeas Corpus, Grand Jury Practice, Forgery, Fraud, Forensic Science, Forensic Medicine, Mail Fraud, Malicious Prosecution, Identity Theft, International Criminal Law, Forensic Accounting, Manslaughter, International Extradition, Misdemeanors, DUI/DWI, Driving While Intoxicated, Domestic Violence, Drivers License Suspension, Criminal Fraud, Criminal Investigation, Death Penalty, Criminal Antitrust, Criminal Prosecution, Expungements, Extortion, Embezzlement, Electronic Surveillance, Federal Criminal Law, Extradition, Forensic DNA, Felonies, Civil Fraud, Crime Victims Compensation, Capital Offenses, Civil Forfeiture, Criminal Conspiracy, Criminal Appeals, Criminal Forfeiture, Criminal Defense, Burglary, Bribery, Automobile Fraud, Assault and Battery, Art Fraud, Search and Seizure, Post-Conviction Remedies, Sex Crimes, Sexual Assault, Parole and Probation, Odometer Tampering, Money Laundering, Murder, Weapons Charges, White Collar Crime, Victims Rights, Vehicular Homicide, Traffic Violations, Theft, Stalking, Shoplifting, Wiretapping, White Collar Fraud, White Collar Criminal Defense, Wire Fraud, White Collar Law
Civil Rights Civil Rights Section 1983


  • 9th Circuit (Active), Arizona (Active), US District Court (Active)

Law School

  • U of Arizona

  • Last Updated: October 22, 2021
  • Typical Hourly Fee:
    Typical Fixed Fee:
    Typical Contingency Fee:
  • Tucson, Arizona, Pima County
  • Accept Credit Cards: Yes
  • Free Consultations: Yes

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