Karl Mueller

Karl A. Mueller, Attorney at Law

Karl A. Mueller was born in Los Angeles, California and is the eldest of 6 children. Mr. Mueller has a Juris Doctorate Degree which he received in 1996 from Whittier Law School in Los Angeles, California. Karl also attended the University of Montana Law School in Missoula, Montana as a visiting student during his final year of law school. In addition to his law degree, he also has a Bachelor of Arts Degree in Speech Communication and an Associate of Arts Degree in the Administration of Justice. Mr. Mueller purposely focused his higher education on a curriculum that he felt would make him a successful criminal trial lawyer. Karl spent many years practicing the art of persuasion while simultaneously completing the same curriculum as law enforcement officers. Mr. Mueller understands the many facets and perspectives of the criminal justice system.

Experienced Defense Attorney

Mr. Mueller is an accomplished experienced trial lawyer who began trying criminal cases over 15 years ago while he was still a law student working for the Los Angeles District Attorney’s Office. Mr. Mueller has been a lawyer in the State of Arizona for over 12 years. He is experienced in both metropolitan and rural courtrooms and is licensed to practice law in the States of Arizona, California, and Montana as well as the United States Court of Appeals for the Ninth Circuit and the United States District Court. Mueller has been asked and appointed by the Arizona State Bar to serve as an arbitrator in disputes between individuals and their lawyers.

Mr. Mueller stopped counting jury trials several years ago after he successfully completed 100 jury trials. He has handled criminal cases from homicides to possession of a Gila Monster. Karl Mueller handles all types of misdemeanor and felony matters. Karl has also had the opportunity to gain experience in appeals and habeas corpus proceedings with the Los Angles District Attorney’s Office. Mr. Mueller spent pent over 5 years in the Special and Major Crimes Divisions of the Maricopa County Attorney’s Office focused on the prosecution of Aggravated DUI and vehicular homicide cases. He has also successfully handled over 100 civil traffic violations, and still enjoys handling civil traffic matters.

Currently, Mr. Mueller focuses exclusively on criminal defense. Karl’s criminal defense practice has the added depth of his experience in handling personal injury, wrongful death, and family law matters. This rounded experience often assists him in addressing his client’s overall concerns and needs in his criminal defense practice.

Arizona attorney Karl Mueller has extensive law enforcement and prosecutorial training which he uses to gain an advantage in the defense of clients. Some of this training includes collision investigation and accident reconstruction. Mr. Mueller has been called to countless on-scene vehicular homicide and serious injury investigations. He has also been trained and successfully completed law enforcement courses in FST (Field Sobriety Testing) HGN (Horizontal Gaze Nystagmus) and DRE (Drug Recognition Expert). Mueller has taught as an instructor in both the HGN and DRE programs as well as other law enforcement and prosecutorial-related programs, some of which he developed.

Mr. Mueller has been involved in well over a thousand DUI cases. He has been called upon to offer expert opinion in civil matters on the prosecution of DUI cases. He was also asked to work with prosecutors and defense attorneys to spearhead the re-write of the DUI, vehicular homicide, and other vehicular felony jury instructions.

Arizona’s Trusted Criminal Defense Attorney

Having spent many years as a prosecutor allows him to evaluate your case not only from a defense perspective, but Mr. Mueller can also see your case just like the prosecutor who will be trying to convict you, which gives you a distinct advantage. Karl Mueller has the trial experience and the extraordinary talent to achieve successful results in your criminal case. Karl carefully handles all his client’s cases personally and is a firm believer in making himself available to his clients 24 hours a day in case of emergencies. Contact the law office of Karl Mueller by calling (602)697-8761.

Practice Areas:

  • Criminal Law/Defense
  • Traffic/Vehicular Crimes

Current Employment Position

  • Attorney

Past Positions

  • Los Angeles District Attorney’s Office, Attorney
  • Maricopa County Attorney’s Office, Attorney


  • Whittier Law School, Costa Mesa, California
    • Juris Doctorate – 1996
  • University of Montana School of Law, Missoula, Montana

Bar Admissions

  • Arizona
  • California
  • Montana
  • U.S. Court of Appeals 9th Circuit
  • U.S. District Court


  • Prosecutor of the Year – MADD
  • Prosecutor of the Year – MCAO
  • Crime Victim’s Rights Special Award
  • Lifeguard of the Year, City of Whittier, California

Professional Associations

  • State Bar of Arizona, Member
  • State Bar of California, Member
  • State Bar of Montana, Member
  • Arizona Attorney’s for Criminal Justice, Member
  • Arizona State Bar, Arbitrator


  • English
  • Portuguese


1760 E. Pecos Road, Suite 332 Gilbert, AZ 85295