Meet the Staff

Jennifer E. Longtin, owner and lead counsel of JLongtin Law, specializing in mental health related cases.

Jennifer E. Longtin

Owner, Lead Counsel

The National Trial Lawyers

Jennifer Longtin is an attorney who is passionate about seeking justice for all people.  She is a former Public Defender with experience in trial, negotiation, and appellate work.  Jennifer has tried cases ranging from simple traffic offenses and DUIs to murder and complex sex offenses.  Jennifer is dedicated to serving the mentally ill who are involved in the criminal justice system; she litigates issues of competency, sanity, and uses a client's situation and history to find treatment alternatives to incarceration. 

Jennifer has also worked with veterans, those suffering from PTSD and TBI, victims of domestic violence, and the developmentally delayed to make sure that the prosecution understands how their unique life experiences play into their current situation and needs.

Jennifer has argued and briefed cases in front of the Colorado Supreme Court, as well as the Colorado Court of Appeals. She has appealed felony and  misdemeanor convictions, and litigated post-conviction proceedings including motions for sentence reconsideration and petitions regarding ineffective assistance of counsel.   Jennifer believes that trial is only the beginning of the fight for her client's liberty. 

Robert Houton

Of Counsel 

Robert Houton is a long-time resident of Colorado. He attended law school at the University of Denver Sturm College of Law, graduating in 2011. While in law school, Robert developed a passion for working with the indigent, since this population is often overlooked and lacks the quality representation that they deserve in the court system. Upon graduation, Robert worked with the Colorado State Public Defender in Pueblo and Denver. In his time there, Robert defended hundreds of clients on charges ranging from petty offenses to serious felonies. He took dozens of cases to jury trial while with the Public Defender's Office.

In 2016,Robert left the Colorado State Public Defender and started a solo law practice where he continued to help protect people. Now with JLongtin Law, he continues helping people who have less access to the legal system and gives them the representation that they need and deserve.

Robert Houton is the Of Counsel attorney working at JLongtin Law.

Amelia Power is the Senior Associate at JLongtin Law.

Amelia Power

Senior Associate

The National Trial Lawyers

The criminal justice system is often a complicated and confusing process.  Amelia understands that each client needs an understanding guide as well as a strong advocate, and Amelia is both.

Amelia is from Colorado and worked as a paralegal in Denver for several years before beginning DU Law School.  In law school, Amelia found her passion advocating on behalf of people accused of crimes.  She spent two years in the Criminal Defense Clinic, learning to strategically litigate through hands-on experience with real clients.  Amelia also shared her passion with other students, working as an Academic Achievement Student Leader in Criminal Law.  Amelia graduated in the top 15% of her class and received the award for Outstanding Criminal Defense Clinic Student. 

After graduation, Amelia started at the Arapahoe trial office of the Colorado State Public Defender.  During her three years as a Deputy Public Defender, Amelia handled hundreds of cases.  Practicing in both adult court and juvenile court, Amelia learned the importance of uncovering each client’s unique story.  Through careful negotiation, extensive mitigation, and strong litigation – including many jury trials – Amelia worked hard to meet each client’s goals in both misdemeanor and felony cases.

Amelia now focuses her criminal defense practice on cases with mental health concerns.  Amelia has argued bond, prepared mitigation, litigated issues related to competency, presented mental health defenses, and done post-conviction work in this area.  Knowing that her clients are dealing with not only a criminal issue but a mental health challenge makes Amelia a compassionate attorney.  Amelia is devoted to working with all parties in the system to craft appropriate and empathetic resolutions to these cases.

Mattson Smith


Mattson Smith is a passionate advocate who believes in working not just for the client, but with them, to find the best outcomes at each stage of the criminal process.

Mattson was raised in a small town in South Carolina, where he learned early that our justice system cannot function without dedicated attorneys who will not only represent their clients, but passionately advocate on their behalf. This passion followed Mattson to college at Furman University where he interned with an International Human Rights Group in Brussels, Belgium, as well as at a legal non-profit in Columbia, South Carolina, dedicated to indigent rights.

Following college, Mattson moved to Colorado to pursue his Juris Doctorate at the University of Denver, where he focused his energy into criminal defense. He spent a year working in the criminal defense clinic at DU and interned with the Colorado Public Defender's Office. His time working on issues ranging from DUI to Sex Assault on a Child, reaffirmed Mattson’s earliest belief that simply representing a defendant is not enough. Criminal Defense requires a holistic approach: understanding your client’s circumstances, their goals, and their experiences, not just through the lens of a criminal trial, but as it relates to their past, present, and future.  Mattson is an enthusiastic about joining the Law Firm’s team and is ready to help guide you through each stage of the criminal process. 

Mattson Smith is an associate at JLongtin Law, helping with the DUI program.

Laurie Larson is the paralegal at JLongtin Law.

Laurie Larson


The majority of Laurie’s professional career has been spent in the field of social science research and organizational management.  As a Researcher, she conducted evaluations for programs serving women who were incarcerated and were struggling with substance abuse issues, children living in an orphanage in Tanzania, at-risk children matched with an adult mentor, and other underserved populations.

Laurie left the field of research to pursue her interests in serving individuals experiencing homelessness.  This led her to the creation of Sharing Pathways, a nonprofit organization focused on assisting women who were experiencing homelessness, obtain permanent housing.  Due to the extreme challenges in Denver’s housing market, Sharing Pathways was closed after successfully placing several women in stable housing.

Now, Laurie combines her research and management skills, her direct service skills and her paralegal training with her passion for equality, social justice and human rights. She provides a continuum of support to both the attorneys and our clients.

Carissa Cherpes

Office Manager

Carissa is a recent graduate from the University of Denver. She majored in Ecology & Biodiversity and English; when she wasn’t studying, she could be found working in her professor’s Entomology lab or exploring the city. She plans to use her degree to one day either work in animal conservation or in a laboratory setting. Until then, Carissa is enjoying working at the firm, often wearing many hats throughout the day: Office Manager, Intakes Coordinator, Social Media Manager, Marketing Team Member, and Lawyer Wrangler.

She chose to join the team because she believes that all people deserve representation, especially those with mental illnesses. She continues to work outside of her field because of the dedicated attorneys she works with and her desire to help the firm’s clients.

Originally from California, Carissa moved to Colorado for school and stayed for the mountains, the many brunch restaurants, and the seasons. She hopes to one day further her education by attending graduate school for her Master’s degree and possibly her PhD.

Carissa Cherpes, the office manager