Criminal Defense Practice Areas

Federal criminal prosecutions differ fundamentally from state cases in investigation methods, charging decisions, sentencing guidelines, and potential consequences. Federal agents—including the FBI, DEA, ATF, Secret Service, IRS Criminal Investigation, and Postal Inspectors—conduct extensive investigations, often lasting months or years, before arrests. When federal prosecutors file charges, they typically have built substantial evidence and rarely lose cases.

Attorney John Helms understands federal prosecutions from the inside. As an Assistant United States Attorney for the Northern District of Texas from 2000 to 2003, he prosecuted fraud, violent crimes, immigration violations, and drug trafficking cases. As an AUSA, he never lost a single trial or appeal.

This prosecutorial background provides unique advantages when defending federal cases. John knows how federal prosecutors think, which evidence they value most, what defenses concern them, and how to negotiate from positions of strength. He recognizes when cases have weaknesses prosecutors hope defendants won't discover—and he knows how to exploit those vulnerabilities to achieve dismissals, favorable plea agreements, or acquittals at trial.

White-collar criminal investigations often begin quietly—a subpoena arrives, agents appear at your office, or you receive a target letter informing you that prosecutors are considering charges. These investigations involve complex financial transactions, voluminous document productions, and sophisticated legal theories that can ensnare innocent business people who made honest mistakes or relied on professionals' advice.

John Helms has defended white-collar cases throughout his career, both as a federal prosecutor and criminal defense attorney. He has also represented some of America's largest corporations, including Microsoft, Bank of America, ACE Cash Express, and Philip Morris.

John's civil defense litigation background—making partner at prestigious firms including Susman Godfrey L.L.P. and Fish & Richardson P.C.—provides additional advantages when defending cases involving complex commercial transactions, contracts, and corporate structures.

Drug prosecutions can carry severe mandatory minimum sentences, asset forfeiture consequences, and collateral impacts affecting employment, professional licenses, immigration status, and constitutional rights. Texas prosecutors aggressively pursue drug cases ranging from simple marijuana possession to multi-kilogram methamphetamine trafficking conspiracies.

As both a former federal prosecutor who handled drug cases and a criminal defense attorney who has defended countless drug charges, John Helms understands the investigation techniques law enforcement uses, the scientific evidence prosecutors rely on, and the constitutional protections that often get violated during drug investigations.

DWI charges in Texas carry serious consequences—jail time, license suspension, insurance increases, employment impacts, and professional license repercussions. Repeat DWI offenses are elevated to felonies with prison sentences. DWI cases involve specialized evidence including breath tests, blood tests, field sobriety tests, and officer observations—all of which can be challenged by experienced defense counsel.

Sex crime allegations destroy reputations, end careers, and tear families apart—even before trials begin. These cases often involve credibility contests between accusers and the accused, with prosecutors, investigators, and juries starting from positions of believing accusers. False accusations occur with disturbing frequency in custody disputes, relationship conflicts, and situations involving mental health issues or substance abuse.

Sexual offense convictions carry prison sentences, lifetime sex offender registration, residence and employment restrictions, and social stigma that follows defendants forever. These cases demand defense attorneys who understand the psychology of allegations, the science of forensic evidence, and the investigative techniques necessary to uncover the truth.

Child sexual abuse allegations represent perhaps the most emotionally charged criminal cases in the justice system. These cases often arise during contentious divorces, custody battles, or situations involving parental conflict. Children's accounts can be shaped by leading questions, adult coaching, implanted false memories, or innocent actions misconstrued as suspicious.

John Helms approaches these sensitive cases with the seriousness they demand while maintaining the presumption of innocence and ensuring thorough investigation of all facts. Child abuse cases can require expert testimony regarding interview techniques, child psychology, forensic evidence interpretation, and the reliability of child witnesses.

Family violence charges arise from conflicts between intimate partners, spouses, family members, or household residents. These cases frequently involve situations where both parties bear responsibility, self-defense claims, exaggerated allegations driven by divorce or custody disputes, or situations where alleged victims later recant but prosecutors proceed anyway.

Texas prosecutors aggressively pursue domestic violence cases even when alleged victims request charges be dropped. Convictions carry jail time, protective orders, firearm prohibitions, and professional consequences. Family violence findings also devastate divorce and custody proceedings.

Murder and manslaughter charges represent the ultimate stakes in criminal defense—potential life imprisonment or even death penalty exposure. These cases demand attorneys with trial experience, investigative resources, and the judgment to navigate complex legal and factual issues including self-defense, insanity, intoxication, accomplice liability, and prosecutorial misconduct.

John Helms' experience includes defending homicide cases at the trial court level and on appeal. His prosecutorial background provides insight into how murder investigations proceed, what forensic evidence means, and how to challenge circumstantial evidence that prosecutors often rely on in these cases.

Criminal appeals provide opportunities to correct trial court errors, challenge improper jury instructions, address insufficient evidence, and contest constitutional violations. Appellate practice requires different skills than trial work—analyzing thousands of pages of transcripts, researching complex legal issues, and writing persuasive briefs that identify reversible error.

As a former federal prosecutor, John Helms never lost an appeal—a testament to his understanding of appellate law and procedure. His appellate experience includes successful representation in the Texas Court of Criminal Appeals (Texas's highest criminal court), Texas Courts of Appeals, and federal circuit courts.

Notable Success: Texas Court of Criminal Appeals — Represented husband and wife convicted of bribing a judge. Through detailed bribery law analysis, reversed both convictions and ordered acquittals. Named "Appellate Lawyer of the Week" by Texas Lawyer Magazine.

IRS Criminal Investigation represents one of federal law enforcement's most sophisticated agencies. Tax prosecutions arise from civil audits, whistleblower complaints, financial institution reporting, or investigations of related criminal conduct. Tax cases involve complex financial records, accounting principles, and legal distinctions between aggressive tax planning and criminal evasion.

The Racketeer Influenced and Corrupt Organizations (RICO) Act provides prosecutors with powerful tools to charge defendants as part of criminal enterprises—even when their individual conduct might not constitute serious crimes. RICO cases involve complex conspiracy theories, pattern requirements, and enterprise elements that create opportunities for aggressive defense.

Securities fraud prosecutions involve allegations of deceptive practices in stock trading, insider trading based on material nonpublic information, market manipulation, accounting fraud, and disclosure violations. These cases require understanding of securities laws, market microstructure, trading patterns, and corporate governance.

A person accused of an immigration crime, like illegal reentry after deportation and alien smuggling, must face the full weight of the federal government. The Trump Administration is well-known for its aggressive prosecution of these crimes.

People accused of immigration crimes are often held in custody and taken to court far from their homes and loved ones. This can be a frightening experience for the accused and their families. It is important to hire a lawyer with extensive experience in these types of cases and in courts around the State of Texas. John has handled federal immigration cases throughout Texas, including in courts on the Southern Border, such as El Paso, Alpine, Del Rio, Laredo, and McAllen.

As a federal prosecutor, John prosecuted people accused of immigration crimes like illegal reentry after deportation and alien smuggling. As a criminal defense lawyer, John relies on that experience when negotiating with prosecutors and advising his clients.

John also works with families to help them understand the process, options, and potential outcomes. He frequently represents Spanish-speaking clients and has regular interpreters who assist him.

John is not an immigration lawyer, so he does not represent people in immigration courts or help them try to become citizens or adjust their status. In many criminal cases, however, a conviction can have significant immigration consequences. For example, certain types of convictions can result in deportation and can prevent a person from ever returning to the United States lawfully. John regularly consults with immigration specialists to try to avoid harsh immigration consequences when possible. Criminal convictions carry severe immigration consequences for non-citizens—including deportation, inadmissibility, and bars to future legal status. Certain crimes trigger mandatory deportation with no relief available: aggravated felonies, crimes involving moral turpitude, controlled substance violations, firearms offenses, and domestic violence.

Criminal defense attorneys must understand immigration law to provide effective representation to non-citizen clients. Plea bargains that seem favorable from a purely criminal perspective may constitute immigration disasters requiring deportation or preventing future legal status.

Theft by check charges arise when individuals write checks knowing they lack sufficient funds or when bank accounts have been closed. While these may seem like minor offenses, multiple check charges can be aggregated to felony theft levels, creating theft convictions on records that affect future employment and professional licenses.

Many hot check cases involve misunderstandings, business disputes, or situations where defendants believed funds were available. An experienced defense attorney can often negotiate dismissals through restitution, challenge aggregation theories, or identify defenses based on lack of intent.