Murder Defense

Client Review

John cannon is an excellent attorney. He is very well versed and he knows his stuff. I tend to worry but he helped me with my military case and kept me calm. I feel bad for pestering him with so many calls but he always answered and I am very grateful. - All Things PsychoJ

Know your Options, if Accused or Charged with Murder

It is important to know your rights and retain an Oklahoma criminal defense attorney with experience defending Murder and Manslaughter cases as soon as possible. Your life and freedom are on the line and you need a defense. In Oklahoma there are a wide variety of homicide, including: Negligent Homicide, Manslaughter, and Murder. Each with its own elements, criminal intent, and proof requirements.


In Oklahoma murder is defined as a homicide with or the specific intent to kill. First Degree Murder requires proof of malice aforethought or premeditated intent to kill, which can be formed in an instant under Oklahoma law. Felony Murder is charged when someone takes a life or is involved in a crime resulting in the loss of someone’s life, sometimes referred to as depraved heart. Murder in the Second Degree requires proof of reckless disregard for human life. Manslaughter in the First and Second Degree each have their own elements, as well as negligent homicide.

Self defense requires proof by the defendant the homicide was committed for the purpose of protecting your life or the life of another person. It is crucial to your freedom and defense you retain a criminal defense attorney with experienced defending murder cases and/or other homicide charges, who can develop and tell your story to the prosecution and/or a jury.

Mitigating and extenuating circumstances may be considered and may lessen the charge or penalty a defendant faces. Mitigating circumstances lessen the moral or legal consequences of a crime. Extenuating circumstances excuse or justify conduct. An expert understanding of the law surroundings these principles is critical to your defense. The following is a list of just a few of these factors: capacity, facts surrounding the homicide, and other issues experienced counsel can help you develop. Extenuating circumstances.

Aggravating circumstances increase the guilt or culpability of a defendant during the course a an alleged crime. The prosecution will try to emphasize these factors during the course of a Murder case or Murder trial. Only experienced criminal defense counsel can understand and effectively respond to aggravating circumstances in your case.


You need a fierce advocate to defend your life and freedom, if you have been accused of or believe you are about to be charged with Murder, Manslaughter, or Negligent Homicide in Oklahoma. You will find experienced, specialized, and caring representation by calling the CANNON & ASSOCIATES. John will do everything possible to defend your freedom and fight your case. As a former prosecutor, he understands the process the government uses to build a case and knows being charged with Murder does not mean you are guilty. You have the right to the presumption of innocence and representation by the best criminal defense attorney you can find. John will investigate the allegations and all events surrounding your case; examine law enforcement conduct; interview all potential witnesses; examine credibility issues with your accusers; file and fight for your case with all available motions by identifying every weakness in the prosecution’s case.


You need expert counsel that has stood beside clients facing Murder and Manslaughter on your side. John Cannon has that experience and will bring it to bear in your case. John is recognized at a Top 40 under 40 in Criminal Defense by the National Trial Lawyers Association. He is a fierce advocate in court and has won acquittals and dismissals for clients facing Murder and Manslaughter charges. He will prepare and fight for you, if you are prepared to go to trial to prove your innocent. Additionally, he has an outstanding record of reaching the best possible outcome for hundreds of clients accused of the wide variety of Murder and Manslaughter charges, evidenced by receiving the highest possible AVVO rating – 10 (superb). Contact CANNON & ASSOCIATES for a free consultation to discuss your case or other serious criminal charge in Oklahoma. 

Contact Attorney John Cannon

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