Being accused of a crime can be confusing and stressful. You may not know what happens next, what your rights are, or whether you need legal representation. A criminal defense lawyer helps people understand the criminal process and protects their legal rights throughout a case.
So, what does a criminal defense lawyer do? Their work can begin before formal charges are filed and continue through negotiations, hearings, trial, sentencing, and sometimes an appeal. The exact role depends on the charges, evidence, jurisdiction, and circumstances of the case.
This guide explains the main responsibilities of a criminal defense attorney, when you may need one, how the defense process generally works, and what to consider when choosing legal representation.
What Is a Criminal Defense Lawyer?
A criminal defense lawyer is an attorney who represents a person accused of committing a crime. Their job is to provide legal advice, protect the client’s rights, examine the government’s case, and develop an appropriate defense strategy.
Criminal cases can involve misdemeanors, felonies, and other offenses. Examples may include theft, assault, drug charges, fraud, property offenses, driving-related offenses, and other allegations.
The lawyer’s role is not to decide whether someone is guilty. Instead, the attorney represents the accused person and ensures that the legal process follows applicable rules.
For general information about criminal justice, you can also explore our criminal law resources.
What Does a Criminal Defense Lawyer Do During a Case?
A criminal defense lawyer may perform many different tasks. The work often includes reviewing evidence, communicating with prosecutors, appearing in court, negotiating where appropriate, and preparing for trial if necessary.
Here are some of the most important responsibilities.
1. Explains the Charges and Legal Process
Legal terminology can be difficult to understand. A defense attorney explains what the charges mean and what may happen at different stages of the case.
Your lawyer may explain court dates, hearings, potential outcomes, procedural requirements, and available legal options. This can help you make informed decisions instead of relying on assumptions or information from social media.
The U.S. Courts guide to federal criminal cases provides general information about how criminal cases proceed in the federal court system.
2. Protects the Client’s Legal Rights
One of the central responsibilities of a defense attorney is protecting the client’s legal rights.
Depending on the circumstances, constitutional protections may affect searches, questioning, identification procedures, evidence, and other aspects of a criminal investigation.
A lawyer can evaluate whether proper procedures were followed and determine whether a legal challenge may be appropriate.
For example, the U.S. Department of Justice information on the exclusionary rule explains how certain evidence may become subject to legal challenges when constitutional requirements are not followed.
3. Reviews Evidence
Evidence is central to most criminal cases. A defense lawyer reviews the information available to determine what it means for the case.
Depending on the allegations, evidence may include police reports, photographs, video, electronic records, witness statements, physical evidence, or expert reports.
The attorney may identify inconsistencies, missing information, credibility issues, or other matters that require further investigation.
4. Investigates the Case
Defense lawyers may conduct or arrange additional investigation. The scope depends on the case.
An investigation might involve interviewing witnesses, reviewing records, examining documents, consulting qualified experts, or reconstructing relevant events.
The purpose is to develop a factual understanding of what happened and identify evidence that may support the defense.
5. Communicates With Prosecutors
Criminal defense lawyers often communicate with prosecutors during a case. These discussions can concern evidence, procedural issues, possible resolutions, and other legal matters.
In some cases, the parties may discuss a plea agreement. Whether a plea agreement is appropriate depends on the facts, applicable law, the available evidence, and the client’s informed decision.
A lawyer should explain the potential advantages and disadvantages of any proposed resolution before the client makes a decision.
6. Negotiates Plea Agreements When Appropriate
Not every criminal case goes to trial. Some cases are resolved through plea agreements.
A plea agreement may involve an agreement concerning charges or sentencing recommendations, depending on the jurisdiction and circumstances. The exact terms can vary significantly.
A defense lawyer can review a proposed agreement and explain its legal consequences. However, the final decision about whether to accept a plea generally belongs to the defendant, subject to applicable law and court procedures.
You should never accept a plea agreement simply because you feel pressured. Ask your attorney to explain the terms and potential consequences before making an important decision.
7. Represents the Client in Court
A criminal defense attorney may represent a client at various court proceedings. These can include arraignments, pretrial hearings, motions, conferences, trials, and sentencing proceedings.
The exact sequence differs between jurisdictions and types of cases.
At court, the attorney may make legal arguments, respond to the prosecution, present evidence where permitted, question witnesses, and address procedural issues.
The U.S. Courts educational resources offer additional background on the role of courts and the judicial process.
8. Files Motions and Challenges
Pretrial motions can address important legal issues. For example, a lawyer may file a motion concerning the admissibility of evidence or another procedural matter when there is a legal basis to do so.
Whether a particular motion is available depends on the facts and law involved.
This is one reason legal representation can be valuable. Criminal procedure contains detailed rules that may be difficult to evaluate without legal training.
9. Prepares for Trial
If a case proceeds to trial, preparation becomes especially important.
A defense lawyer may review evidence, develop legal arguments, prepare witnesses where appropriate, analyze the prosecution’s theory, and prepare questions for witnesses.
During trial, the attorney may make opening and closing arguments, question witnesses, object to certain evidence or questions, and present the defense according to applicable court rules.
Going to trial does not guarantee a particular outcome. A responsible lawyer should explain the potential risks and uncertainties involved.
10. Helps During Sentencing
If a defendant is convicted or enters a plea that results in a conviction, the lawyer’s role may continue through sentencing.
Depending on the jurisdiction, the attorney may present information relevant to sentencing and argue for an appropriate outcome under the applicable law.
Sentencing rules can be complicated. Factors may include the offense, criminal history, statutory requirements, sentencing guidelines, and other circumstances.
11. May Handle Appeals or Post-Conviction Matters
A criminal defense lawyer may also help with an appeal or another post-conviction legal proceeding when appropriate.
An appeal is not simply a second trial. It generally focuses on legal or procedural issues identified under the applicable appellate rules.
Because strict deadlines can apply, anyone considering an appeal should obtain qualified legal advice promptly.
When Should You Hire a Criminal Defense Lawyer?
There is no single answer for every situation. However, if you are under investigation, have been arrested, charged with a crime, or ordered to appear in court, speaking with a qualified attorney can help you understand your legal position.
In some situations, obtaining legal advice early may help you understand how to respond to law enforcement or court requirements. Do not assume that a case is minor simply because the potential punishment appears limited.
If you have received court documents, review them carefully and pay attention to any stated deadlines or hearing dates.
Public Defender vs. Private Criminal Defense Lawyer
People who cannot afford private counsel may qualify for a public defender or another form of court-appointed representation, depending on the jurisdiction and circumstances.
A public defender is a licensed attorney who represents eligible defendants. Private defense lawyers are hired directly by their clients.
The right option depends on your financial circumstances, eligibility, case needs, and local rules.
The U.S. Department of Justice information on federal public defenders provides general information about federal public defender services.
How Much Does a Criminal Defense Lawyer Cost?
Criminal defense attorney fees can vary significantly. The cost may depend on the type of charge, complexity of the case, attorney experience, location, expected workload, and whether the case goes to trial.
Some lawyers charge a flat fee. Others may charge hourly rates or use another fee arrangement.
Before hiring an attorney, ask for a clear explanation of the fee structure. Find out what services are included and whether additional expenses may apply.
Questions to Ask About Legal Fees
- How is the attorney’s fee calculated?
- What services are included?
- Are court or investigation expenses separate?
- Does the fee change if the case goes to trial?
- Will the agreement be provided in writing?
How to Choose a Criminal Defense Lawyer
Choosing an attorney is an important decision. Start by looking for a lawyer who regularly handles criminal defense matters relevant to your situation.
Check professional credentials and licensing. Then consider experience, communication, availability, and fee transparency.
During a consultation, ask whether the lawyer has handled similar cases. Ask how they would evaluate the evidence and what information they need from you.
Do not choose an attorney solely because of a large advertisement or promises of a particular result. No ethical lawyer can guarantee a specific outcome in a criminal case.
Red Flags to Watch For
Be cautious if an attorney guarantees that you will win, promises a specific sentence, refuses to explain fees, or pressures you to make an immediate decision without understanding the agreement.
You should also be wary of anyone who tells you to ignore court orders or legal deadlines.
A professional attorney should explain the situation honestly. They should identify uncertainties and help you understand your available options.
What to Bring to a Criminal Defense Consultation
Preparing for your consultation can make the meeting more useful. Bring any documents you already have that relate to the case.
- Court notices and charging documents
- Police paperwork
- Relevant correspondence
- Names of potential witnesses
- Important dates and locations
- Other documents connected to the allegations
Be honest with your lawyer. Your attorney needs accurate information to provide appropriate legal advice and prepare a defense.
Final Thoughts: What Does a Criminal Defense Lawyer Do?
So, what does a criminal defense lawyer do? A criminal defense lawyer represents an accused person and helps protect their legal rights throughout the criminal justice process.
The attorney may investigate the allegations, review evidence, communicate with prosecutors, file motions, negotiate potential resolutions, represent the client in court, prepare for trial, and assist with sentencing or appeals when appropriate.
The right lawyer depends on the circumstances of the case. Look for relevant experience, clear communication, transparent fees, and a realistic approach. Most importantly, choose an attorney who will explain your options and help you understand the legal process.
If you are researching your options, visit our criminal defense resources for additional educational information.
Disclaimer: This article is for general informational purposes only and is not legal advice. Criminal laws and procedures vary by jurisdiction. If you are accused of a crime or are under investigation, consider consulting a qualified criminal defense lawyer licensed in the relevant jurisdiction.