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The same conduct can put you in two completely different courthouses. A convicted felon stopped with a pistol in his glovebox may face a state charge of unlawful possession. If the gun crossed state lines, or was bought through a dealer who falsified the paperwork, federal prosecutors can charge the identical conduct under 18 U.S.C. § 922(g). Different building, different prosecutor, different rules, and often a dramatically different sentence.
That split is what people mean by federal vs. state crimes, and it is not academic. It decides who charges you, which judge handles your detention hearing, what your sentencing range looks like, and whether your lawyer needs to know the federal guidelines manual as well as your county’s local rules.
Two Sovereigns, Two Sets of Laws
The United States runs a dual system. States hold general police power, which is why murder, burglary, assault, DUI, and most domestic violence cases are state crimes by default. The federal government has no general police power. Congress can only criminalize conduct tied to an enumerated constitutional authority: interstate commerce, the postal service, federal tax law, federal property, immigration, and the territories.
In practice, Congress has stretched those hooks a long way. The Commerce Clause supports drug and firearms statutes that reach conduct occurring entirely inside one state, as long as the activity substantially affects interstate commerce. Courts have upheld that reading for decades.
Common federal charges
- Drug trafficking and conspiracy under the Controlled Substances Act, 21 U.S.C. § 841
- Bank robbery, 18 U.S.C. § 2113
- Firearms offenses, from felon in possession to trafficking and straw purchasing
- Wire fraud, mail fraud, and computer intrusion under 18 U.S.C. § 1030
- Immigration violations, including illegal reentry after deportation
- Tax evasion and failure to file
- Child exploitation and trafficking offenses
What usually stays in state court
Most criminal cases never touch a federal docket. Assault, robbery, theft, DUI, and drug possession charged at the user level are handled by district attorneys or county prosecutors. State court is where the overwhelming majority of American criminal cases resolve, and where local practice, local judges, and local plea cultures matter more than anything in a textbook.
The Dual Sovereignty Rule, and Why an Acquittal May Not End It
Because states and the federal government are separate sovereigns, a prosecution by one does not bar a prosecution by the other. The Supreme Court reaffirmed that rule in Gamble v. United States in 2019, declining to overturn more than a century of precedent. A state jury can acquit you, and a federal grand jury can still indict you for the same conduct.
The check on this is policy, not law. The Justice Department’s Petite policy discourages federal prosecution after a state case for the same acts unless a substantial federal interest went unvindicated. It is internal guidance. Prosecutors can waive it, and defense counsel cannot rely on it as a shield.
Sentencing: Where the Gap Shows Up
Federal sentencings follow the U.S. Sentencing Guidelines, a grid of offense levels and criminal history categories that produces an advisory range. Mandatory minimums are common, especially in drug and firearms cases. There is no parole in the federal system; Congress abolished it in 1987. Good time credit is capped at roughly 15 percent under 18 U.S.C. § 3624(b), so a federal sentence is served close to its stated length.
State systems vary enormously. Some retain parole boards and earned credits that can cut a term substantially. Others offer diversion programs, drug courts, and deferred adjudication that never produces a felony conviction at all. A three-year state sentence and a three-year federal sentence often mean very different amounts of time behind bars.
Plea rates run high on both sides. Roughly 97 to 98 percent of federal convictions come from guilty pleas, and judges sentence below the guideline range in a large share of cases. Understanding how your specific calculation works, including relevant conduct and role adjustments, is often the whole ballgame.
Procedure: Grand Juries, Detention, and Speed
How charges begin
Federal felonies generally require indictment by a grand jury under the Fifth Amendment. Your lawyer may never see the evidence before the indictment comes down, because grand jury proceedings are secret and defense counsel has no right to appear. State felony cases often begin with a preliminary hearing where a judge decides whether probable cause exists and where your lawyer can cross-examine witnesses early.
Timing
The federal Speedy Trial Act gives prosecutors 70 days from indictment to trial, with exclusions that can stretch it. State deadlines differ, and many are looser. Federal cases tend to move quickly after indictment, which compresses the window to investigate, retain experts, and negotiate.
Detention
Federal detention hearings under the Bail Reform Act of 1984 focus on risk of flight and danger to the community, and the presumption can shift against you in drug and firearms cases. State bail systems vary widely, and some have moved toward risk-based pretrial release.
Why the Line Changes Your Defense
If a case can be charged either way, the strategic questions change. Federal discovery obligations under Brady and Rule 16 are broader in some respects, and federal agents typically build a longer paper trail before anyone is charged. State cases often turn on traffic stops, search and seizure, and witness credibility, which is why suppression motions carry so much weight at that level and why securing a defense attorney who actually fights for you early in the process matters.
Drug cases illustrate the split. A federal indictment usually means a conspiracy charge, multiple defendants, and sentenced conduct that includes drugs attributed to you from the entire organization. That is a different fight from a single-count state possession case, and it calls for real strategies for fighting drug charges rather than a generic plea negotiation.
One practical rule: find out early which sovereign is charging you. If federal agents conducted the interview, if a U.S. Attorney’s office is involved, or if a federal grand jury subpoena arrives, assume the case may be federal even before charges are filed.
Questions Worth Asking a Defense Lawyer
Before you retain anyone, ask whether they have appeared in federal district court, how many cases they have taken to trial, and how they plan to attack the guideline calculation. Ask which agency is investigating and whether a target letter has been sent. A lawyer who handles state cases well may have no federal experience at all, and the reverse is equally true.
Finding a criminal lawyer near you who actually fights for you comes down to specifics: courtroom history in the right building, familiarity with that particular prosecutor’s office, and a straight explanation of what your sentencing exposure really is.
Bring the paperwork you have: the charging document, the bond conditions, any subpoena, any letter from a federal agency. Ask what the next court date is and what happens at it. Ask what the statutory maximum would be under the worst plausible facts, and what has to be true for that to change.
The difference between a state case and a federal one is not a technicality. It is the difference between a county jail term with parole eligibility and a federal prison term served at roughly 85 percent, between a preliminary hearing next month and a sealed indictment you learn about when marshals knock. Knowing which system has you, and hiring someone who works in it, is the first decision that actually matters.
