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Sean Harrell | Denver Criminal Defense Attorney

Meet Criminal Defense Attorney Sean Harrell

As a former Deputy District Attorney in Arapahoe and Douglas County, Colorado, I possess specialized insight into our criminal justice system.  Due to the high volume of cases in courtrooms in Denver, Jefferson and Arapahoe Counties, prosecutors are forced to analyze cases quickly and make fast decisions that can affect unrepresented citizens for the rest of their lives.  Many people do not feel they have a choice other than to accept the offer presented to them by the prosecutor.  Years, months or days later they regret accepting an offer, but it is too late.  Now as a criminal defense attorney, I use my knowledge of our jury trial system and plea negotiation process to help clients receive the best possible outcomes and make informed decisions.  My goal as a defense lawyer is to protect your rights and educate you about the judicial system and consequences you face.

As a former DA, I understand the

inner workings of the courtroom.

My Education and Experience

I earned my Bachelor of Arts in Political Science and German from Lipscomb University, a private liberal arts university in Nashville, Tennessee.  After working several years in Nashville, I returned to school to earn my Juris Doctorate at the University of Denver, Sturm College of Law.  My desire to serve the community led me to join the 18th Judicial District as a Deputy District Attorney.  As a prosecutor, I managed hundreds of criminal cases in a fair, just and ethical manner.  I successfully tried dozens of cases before juries, including cases involving domestic violence, child abuse, DUI’s, and sex offenses.  I reentered private practice representing criminal defense and family law matters, before transitioning to full time criminal defense.

I managed hundreds of cases and

first-chaired dozens of jury trials.

How My Experience Will Help Your Case

My experience on both sides of the criminal justice system and with family law matters allows me not only to advise clients as to the penal system, but also to advocate on their behalf with an understanding of the wider collateral consequences to their personal lives.  I aggressively represent the rights of my clients in Adams, El Paso, and Boulder County, and educate prosecutors as to ulterior motives of the complaining witnesses in domestic violence, child abuse and sex offense accusations.  Don’t stand alone in the courtroom – work with a lawyer who has experience on the other side, and can offer expertise as your advocate.

Sean Harrell

Criminal Defense Lawyer

As a former District Attorney, I have a unique perspective on the criminal justice system and will guide you expertly through the criminal justice system.


Practice Areas

100% Criminal Defense and Litigation

Bar Admissions
  • Colorado, 2010
Associations & Memberships


Get Help Now

If you or a loved one is facing criminal charges in the Denver area, be smart, exercise your right to remain silent, and contact an experienced criminal defense attorney at the O’Malley Law Office at 303-830-0880. Together, we can protect your future.
Request a Free Consultation

What Clients Say About Sean Harrell:
Iwas very pleased with Sean being my lawyer. He gave me great advice and was very helpful during my case. He also answered any of my questions or concerns in a timely manner, and was also a very respectful person in general. I was very happy to have him represent me! I would highly recommend him to anyone who needs a lawyer!5-stars
Jillian D
Thank You for taking care of my case and I sincerely appreciate for all the help and support you have provided me during the past year. I am happy for the legal services I received from your esteemed organization. My special Thank You to Mr. Sean Harrell and your staff at O’Malley Law Office. I have had difficult times but I knew I was in good hands when we approached your organization for legal services, and the level of support and motivation you have provided to us was outstanding, we will never forget in our life.With the success in my case, I feel comfortable to move on in my career path and pursue my career goals. I am confident and looking forward for a bright future ahead and I feel very bold to say I have never been charged. I sincerely appreciate Mr. Sean and his team from the bottom of my heart for your proficiency in resolving critical issues and protecting our human rights. I strongly recommend O’Malley Law Services to meet your legal services, you are in expert hands.


Ravi K
Last year I made a colossal mistake needing representation to prevent possible jail time and a huge fine. As soon as I realized I would need a lawyer I found O’Malley Law Office online. Sean Harrell was the first person I spoke with, during the call he was patient while I told him my situation. Sean met my boyfriend and I with a handshake and a smile at the free consultation. He then spent the next hour explaining his background and how he would be able to help me out of the mess I had created for myself. I was impressed with his work, his experience and the time he gave me. When court came, not only did he keep me out of jail and only court fees to pay, he gave me peace of mind. If you need representation do yourself a favor and call O’Malley law office!


Kandice G