A criminal defense lawyer represents a person accused of a crime and works to protect that person’s constitutional rights from the first police contact through any appeal. What does a criminal defense lawyer do day to day? They investigate the charges, challenge the government’s evidence, argue motions, negotiate with prosecutors, try the case to a jury if it goes that far, push for the lightest possible sentence, and keep fighting through appeals and post-conviction petitions when the verdict goes the wrong way.
Investigating the Case and Reviewing the Evidence
Most of the work happens before anyone sees a courtroom. Once hired or appointed, the lawyer reviews the charging documents and arrest reports, then formally requests everything the government intends to use through discovery.1United States Department of Justice. Discovery Prosecutors have a continuing obligation to turn over that material, which includes witness statements, lab results, and physical evidence.
Reading what the prosecution sends is only part of it. Defense attorneys look for problems: a confession taken without proper warnings, a lab test with a broken chain of custody, a witness whose story shifted between interviews. Good ones hire their own investigators, interview witnesses independently, and bring in experts when the case involves DNA, digital forensics, or toxicology.
One of the strongest protections during this phase comes from Brady v. Maryland, which requires prosecutors to turn over any evidence favorable to the defense. Burying evidence that could help prove innocence or reduce a sentence violates due process.2Justia Law. Brady v. Maryland, 373 U.S. 83 (1963) A lawyer who suspects a Brady violation can file motions to compel disclosure, and evidence that surfaces later can be grounds for overturning the conviction.
Early Court Appearances and Pre-Trial Motions
The lawyer appears at the arraignment, where the client receives a copy of the charges and enters a plea.3Legal Information Institute. Federal Rules of Criminal Procedure – Rule 10 Arraignment A bail hearing usually follows. The attorney argues for release pending trial, either on recognizance or at a workable bond. These early appearances matter more than people realize. A client stuck in jail has a much harder time participating in their own defense.
The real pre-trial firepower comes through motions. A motion to suppress asks the court to throw out evidence police obtained through an illegal search. The Fourth Amendment protects against unreasonable searches and seizures, and evidence collected in violation of that right can be excluded under the exclusionary rule.4Congress.gov. Amdt4.7.1 Exclusionary Rule and Evidence When the suppressed evidence was central to the state’s case, the charges may collapse. Other common motions ask the court to dismiss charges for insufficient evidence or to exclude unreliable witness testimony.
Alongside the paperwork, defense lawyers spend real time preparing the client. That means explaining how each hearing works, what cross-examination feels like if the client takes the stand, and how to behave in court. The strategic decisions, especially whether to accept a plea or take the case to trial, belong to the client, not the lawyer.
Negotiating a Plea
Roughly 90 to 95 percent of criminal cases in both federal and state courts end in a plea bargain rather than a trial.5Bureau of Justice Assistance. Plea and Charge Bargaining Research Summary That makes negotiation one of the most consequential things a defense attorney does. In a plea bargain, the defendant agrees to plead guilty, often to a reduced charge or in exchange for a lighter sentence recommendation, and avoids the cost and uncertainty of trial.
The lawyer’s job is to use weaknesses in the prosecution’s evidence to extract the best possible deal. A constitutional violation in the arrest, a shaky eyewitness identification, or a forensic test that doesn’t prove what prosecutors claim all carry bargaining power. Reducing a felony to a misdemeanor can be the difference between prison and probation, or between a permanent record and one that can eventually be sealed.
Before any guilty plea is accepted, the judge must personally confirm that the defendant understands the rights being waived and that the plea is voluntary.6Legal Information Institute. Federal Rules of Criminal Procedure – Rule 11 Pleas The lawyer’s duty to explain those consequences starts well before that moment. A good one walks the client through the maximum penalty, any mandatory minimums, immigration consequences for non-citizens, and the long-term effect on employment and housing. The final call to accept or reject the offer always belongs to the client.
Representing the Client at Trial
If the case goes to trial, the lawyer takes on the role most people picture. It starts with jury selection, called voir dire, where the attorney questions potential jurors to identify biases and build a panel likely to weigh the evidence fairly.7United States Courts. Juror Selection Process A biased juror who slips through can make everything that follows irrelevant.
After opening statements lay out the defense theory, the attorney’s primary weapon is cross-examination. The Sixth Amendment’s Confrontation Clause guarantees the right to confront the witnesses testifying against you, and cross-examination is how that right gets exercised.8Congress.gov. Right to Confront Witnesses Face-to-Face A skilled cross-examiner tests whether the witness actually saw what they claim, exposes inconsistencies, and surfaces reasons the witness might shade the truth. The lawyer also objects to improper questions and keeps the trial within the rules of evidence.
If the defense puts on its own case, the attorney may call alibi witnesses, character witnesses, or experts to counter the prosecution’s narrative. The defense is never required to present evidence or call witnesses; the burden of proof always rests on the prosecution. The trial ends with closing argument, where the lawyer ties together every weakness in the government’s case and explains why the evidence falls short of proof beyond a reasonable doubt.
Arguing for a Lighter Sentence
A verdict or guilty plea is not the end. At sentencing, the judge decides the actual punishment, and the lawyer’s job is to argue for the lightest sentence the law allows. Judges weigh both aggravating and mitigating factors.9United States Department of Justice. Sentencing
Building a mitigation case means gathering details that put the offense in context and humanize the client:
- No prior record, which separates a first-time offender from a repeat one.
- A minor role in a larger scheme.
- Stable employment and dependents who rely on the client’s income or care.
- Rehabilitation efforts already underway, such as substance abuse treatment, counseling, or community service.
- Genuine remorse, which carries weight with most judges.
The attorney often submits letters from employers, family members, and community leaders, and argues for alternatives to incarceration like probation, house arrest, or community service. In federal cases, the lawyer reviews the sentencing guidelines calculation and challenges any enhancements the prosecution seeks, because a single disputed factor can shift a sentence by years.
Appeals and Post-Conviction Petitions
Defense lawyers also handle appeals, asking a higher court to review the trial for legal errors that affected the outcome. Common grounds include improper jury instructions, wrongly admitted evidence, prosecutorial misconduct, and constitutional violations during the investigation or trial.
An appeal is a different animal from a trial. There are no witnesses, no jury, and no new evidence. The lawyer reviews the full trial record, drafts an appellate brief laying out the legal arguments for reversal, and may argue before a panel of appellate judges, though many appeals are decided on the briefs alone.
Beyond direct appeal, defense attorneys can file post-conviction motions challenging the legality of a sentence or imprisonment. A habeas corpus petition argues the defendant is being held in violation of their constitutional rights. One common post-conviction claim is ineffective assistance of counsel, which under Strickland v. Washington requires showing that counsel’s performance fell below professional standards and that the deficient performance prejudiced the result.10Congress.gov. Prejudice Resulting from Deficient Representation Under Strickland It’s a high bar, but it exists because the right to counsel means the right to competent counsel.
Keeping What You Say Confidential
Anything a client tells their defense lawyer is protected by attorney-client privilege and professional confidentiality rules. Under the ethical rules governing lawyers, an attorney cannot reveal information related to the representation unless the client gives informed consent or a narrow exception applies.11American Bar Association. Rule 1.6 Confidentiality of Information Lawyers must also take reasonable steps to prevent accidental disclosure.
This is what allows honest communication. A lawyer can’t build an effective strategy if the client is hiding critical facts. The privilege belongs to the client, and it survives even after the representation ends.
The exceptions are narrow. A lawyer may disclose confidential information to prevent reasonably certain death or serious bodily harm, to prevent a client from using the lawyer’s services to commit a future crime or fraud causing substantial financial harm, or to comply with a court order. Conversations about past conduct remain fully protected. Telling your lawyer what happened does not authorize them to share it with anyone.
Public Defenders Versus Private Attorneys
The Sixth Amendment guarantees anyone facing criminal prosecution the right to “the Assistance of Counsel for his defence.”8Congress.gov. Right to Confront Witnesses Face-to-Face In Gideon v. Wainwright, the Supreme Court held that anyone too poor to hire a lawyer must have one appointed, because no defendant “can be assured a fair trial unless counsel is provided for him.”12Justia Law. Gideon v. Wainwright, 372 U.S. 335 (1963) Federal law carries this out by requiring every district court to maintain a plan for representing any financially eligible person charged with a felony or serious misdemeanor.13Office of the Law Revision Counsel. 18 U.S. Code 3006A – Adequate Representation of Defendants
Public defenders are fully licensed attorneys who handle the same work described above. The main practical difference is caseload. Public defenders carry heavy ones, which limits the time they can spend on any single case. Private attorneys typically carry fewer cases, giving them more room to investigate, hire outside experts, and tailor strategy. You don’t choose your public defender the way you choose a private lawyer. Both are bound by the same ethical duties.
What a Criminal Defense Lawyer Costs
Criminal defense attorneys generally bill one of two ways: a flat fee or an hourly rate with a retainer. For straightforward matters like a first-offense misdemeanor, many lawyers quote a single flat fee that covers everything from the initial consultation through resolution. Flat fees for misdemeanors generally range from a few thousand dollars into the low five figures, depending on complexity and the attorney’s experience.
For more complex cases, attorneys bill hourly and ask for an upfront retainer that sits in a trust account and is drawn down as work is performed. When it runs low, the client replenishes it. Hourly rates vary with experience, charge severity, and local market, but commonly fall between $150 and $500 per hour. Initial retainers often run $2,500 to $10,000. Any unused portion is generally refundable, though you should confirm that in writing before signing a fee agreement.
If you qualify for a court-appointed attorney, representation is provided at no cost. Even if you don’t qualify, many private attorneys offer free initial consultations and payment plans. The cost is real, but it is measured against what a conviction can do to your freedom, employment, housing, and civil rights for years, sometimes permanently.