Criminal law in United States

Criminal law in the United States is enforced by the government rather than by a private person. Most cases are handled under state law, while federal law covers matters connected with federal authority, national borders, federal property, interstate conduct, or specific federal offenses. Crimes are often described as misdemeanors or felonies. A misdemeanor is generally less serious, while a felony can carry a longer possible sentence and more lasting consequences. The exact meaning and penalties depend on the jurisdiction and offense. A typical case may involve investigation, arrest or a summons, booking, an initial court appearance, charging, bail or release conditions, evidence exchange, motions, plea discussions, trial, sentencing, and possible appeal. Not every case passes through every stage. The government must prove the charged offense beyond a reasonable doubt at trial. The accused person is presumed innocent unless and until the case is proved or resolved by a lawful plea. People accused of crimes generally have important procedural rights, including the right to remain silent, the right to legal counsel, and the right to challenge the government's case. Police encounters can have different rules depending on whether a person is questioned, detained, searched, or arrested. Many cases end with a plea agreement instead of a trial. A plea can reduce uncertainty but may create a conviction and collateral consequences, so it should be considered only after understanding the charge, evidence, sentence, and future effects. Sentencing can include custody, probation, fines, restitution, treatment, community service, or other conditions. A conviction may also affect immigration, licenses, housing, firearms rights, professional work, and future criminal cases. The main limits are that criminal procedure varies by jurisdiction and small facts can change the result. Anyone contacted as a suspect, arrested, charged, or served with a court notice should avoid discussing the facts publicly and seek a criminal defense lawyer or appointed counsel promptly.