David C. O’Mara’s practice is concentrated in appellate advocacy, bankruptcy, family law, personal injury, civil litigation, and securities and shareholder disputes. As a native Nevadan, with over a decade of experience practicing in the state, David has developed a comprehensive understanding of the nuances of Nevada law and practice. David has been involved in numerous securities and shareholder actions which have resulted in the recovery of millions of dollars to the shareholders. In addition, David has successfully represented his clients at all state and federal courts in Nevada, including bench trials, jury trials and appellate arguments in the Nevada Supreme Court.

Jeremy Mondejar is a practicing lawyer in the state of Nevada handling Criminal Defense matters.

Anthony P. Sgro is a partner and founding member of Sgro & Roger, LLC. After attending the University of San Diego for both his undergraduate education and law school, Mr. Sgro returned to Las Vegas and began practicing primarily in the area of criminal defense. In short order, he became a “death qualified” attorney and focused on defending those charged with capital murder offenses. ​ After trying numerous cases, Mr. Sgro used his unique trial experience to branch out into other areas of law, including personal injury, entertainment, and business law. Remarkably, he found his trial skill set transferred to those areas as well. Since the beginning of his career, Mr. Sgro has tried over 125 jury trials in both the civil and criminal arena. Most notably, as trial counsel, Mr. Sgro secured numerous acquittals in criminal cases including acquittals in extortion cases, drug cases, sexual assault cases and murder cases. He has been awarded millions of dollars by way of jury verdicts in medical malpractice cases and in personal injury cases. He also secured the largest slip and fall personal injury verdict to be awarded against Walgreens corporation, as well as a real estate trial verdict in excess of $55 million. Notably, that same trial experience allowed him to resolve the largest settlement for a single plaintiff personal injury case in Nevada history, which exceeded $30 million. ​ Several years ago, Mr. Sgro once again expanded his practice and business interests. He had the privilege of representing, and routing Prince’s 2013 West Coast tour, which spanned 13 U.S. cities. Most recently, his legal experience has allowed him to participate in the gaming arena, including both local and overseas gaming operations. ​ Years ago, Mr. Sgro teamed up with long time friend David Roger to create the firm that exists today. Mr. Roger is the former District Attorney for all of Clark County, Nevada, and he served in that capacity for approximately 25 years.

We are a small and highly focused law firm operating in Clark County Nevada. Our Managing Attorney, Tim Treffinger is a former prosecutor with the Storey County District Attorney's Office, and the Nevada Attorney General's Office. Mr. Treffinger prides himself on working with individuals to meet their legal needs at a reasonable fee, with payment plans available depending on qualification, and works to provide options for those who seek representation. In 2022 Mr. Treffinger was the Republican Nominee for Clark County District Attorney receiving votes from both Democrats and Independents (along with his Republican party votes), and totaling nearly 300,000 votes in support of his campaign.

Zachary focused his law school experience on criminal law, externing with a local public defender’s office, the United States Attorney’s Office for the District of Nevada, and multiple criminal defense firms. Zachary also served in the law school’s criminal defense appellate clinic, where his brief on behalf of an indigent client earned the law school’s award for excellence. After law school, Zachary relocated to Tampa, Florida where he began his career with the Hillsborough County Public Defender’s Office before moving to a highly regarded criminal defense firm in the Tampa area. He has defended individuals accused of a broad range of offenses, including DUI, battery, drug and weapons possession, sex crimes, and homicide. Zachary returned to Las Vegas in 2020. Prior to joining Sgro and Roger, he served as a judicial law clerk for the Honorable Ellie Roohani in the Eighth Judicial District Court, managing a split docket of criminal and civil cases. Outside of the office, Zachary enjoys traveling, playing poker, and providing long-distance support for his University of Connecticut basketball teams.

Dewayne has been a resident of our local community for the past 26 years, having settled in Las Vegas in 1986 when his father, a member of the Air Force, was stationed at Nellis AFB. Dewayne attended Eldorado High School and graduated with honors. Dewayne then attended Brigham Young University on an academic scholarship and was invited to “walk-on” to the nationally ranked Cougar football team. After playing football for two years, Dewayne decided to dedicate more time to his academics and the community. Dewayne was a member of the Black Student Union at the school, which enabled him to participate in many worthwhile endeavors involving the local community. Dewayne graduated from Brigham Young University with a Bachelor of Science degree in Sociology. Dewayne then enrolled in law school at Brigham Young University, looking forward to embracing the academic challenges it presented. During his law school career, Dewayne was a key member of both the Minority Law Student Association and the Native American Law Student Association. Both organizations allowed him to continue serving the local community through various projects and clinics.

I am a first generation American. My parents were born and raised in Argentina so I have spoken Spanish since I first learned to speak. I graduated from Clark High School and received my bachelor’s degree from the University of Las Vegas, Nevada. After graduating from UNLV, I received my law degree from California Western School of Law in San Diego, California. During law school I was a member of the Law Review and elected as the Executive Editor of the International Law Journal. I graduated law school magna cum laude and in the top 4% of my class. I received the Am Jur Award for receiving the highest grade in my class for Criminal Procedure, Civil Procedure II, and Comparative Law. After graduating law school I took and passed the Nevada and California Bar examinations. Upon receiving my law license, I began working at Alverson, Taylor, Mortensen & Sanders, a civil litigation law firm in Las Vegas. As an associate attorney I defended medical doctors and dentists in medical malpractice cases, manufacturers in products liability cases, and numerous diverse companies in personal injury cases. After a year and a half at Alverson & Taylor, I joined the Clark County Public Defender’s Office and spent twelve years representing thousands of indigent defendants in diverse criminal matters. My first two years at the Public Defender’s Office were spent working in the Juvenile Division. I handled thousands of juvenile delinquency cases, including contested hearings and adult certifications. I argued a juvenile appeal before the Nevada Supreme Court, which resulted in a published opinion and victory for my client: In re T.R., 119 Nev. 646 (2003). After two years in the Juvenile Division, I transferred to the adult office of the Public Defender’s Office and spent the next year two years handling felony, gross misdemeanor, and misdemeanor cases. Thereafter, I was assigned to the sexual assault team where I spent five years handling life sentence cases of sexual assault and lewdness with a child. My last three years at the Public Defender’s Office I worked exclusively handling murder and death penalty cases. Although my time at the Public Defender’s Office was very rewarding, my desire to create and build a top notch private law firm that could provide clients with unique and exceptional legal representation led me to establish the Nobles & Yanez Law Firm. Based on my diverse and extensive criminal and civil litigation experience, there are almost no type of cases that I have not personally handled.

Danielle is an associate attorney at Sgro & Roger, representing clients in a range of personal injury, criminal, and family law matters. She is devoted to helping her clients obtain the most favorable outcome in the resolution of their cases. Danielle joins the firm after completing a judicial clerkship with the Honorable Eric Johnson in Department XX of the Eighth Judicial District Court. During her term, she assisted the Court render decisions in various civil and criminal matters. She also gained invaluable trial experience working on medical malpractice, wrongful death, catastrophic injury, and felony cases.