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What a Criminal Defense Attorney Does: from Investigation to Trial in NYC

Practice Area:Criminal Law
Jurisdiction:New York

A criminal defense attorney does far more than appear in court. Learn how our attorneys protect your rights at every stage of your case in New York.

From the moment police begin their investigation, every decision matters. Our attorneys review evidence, challenge unlawful searches, negotiate with prosecutors, and build a defense strategy tailored to NYC's courts. Understanding what your attorney actually does, and when, can make the difference in the outcome of your case.


1. The Core Role: Advocate and Constitutional Guardian


A criminal defense attorney is both your legal voice and the person holding the government to its own rules. In New York, those two jobs run together from the first police contact.


What New York Law Guarantees

Under New York Constitution Article I, Section 6, every person accused of an infamous crime has the right to appear and defend in person and with counsel, to be informed of the nature and cause of the accusation, and to confront the witnesses against them. Our criminal defense attorneys treat those protections as the operating framework for every decision we make in a case, not as procedural formalities.


2. Case Assessment and Investigation


Defense work starts before charges are filed. Getting involved early preserves options that close once a case moves forward.


Challenging Evidence at the Source

New York Constitution Article I, Section 12 prohibits unreasonable searches and seizures and, unlike the federal Fourth Amendment, expressly protects telephone communications from warrantless interception. If police searched a home, vehicle, or phone without a valid warrant or a recognized exception, our attorneys file a motion to suppress that evidence. In drug crimes defense cases, the outcome of that motion often determines whether the prosecution can proceed at all.

Building the Early Record

Our attorneys review police reports and arrest records for procedural errors, identify witnesses, retain experts where needed, and advise clients on what to say, and what not to say, before formal charges are filed.


3. Pre-Trial Responsibilities and Negotiations


Most criminal cases in New York resolve before trial. This phase is where our attorneys do the most work to shape what happens next.


Motions That Change the Case

Three pre-trial motions come up in most cases:

  • Motion to suppress illegally obtained evidence under New York Criminal Procedure Law Article 710
  • Motion to dismiss for insufficient evidence or procedural defect
  • Motion for full discovery of prosecution evidence and witness lists

Grand Jury, Bail, and Plea Decisions

Under New York Constitution Article I, Section 6, capital and other infamous offenses require grand jury indictment before trial. A defendant may waive that right only in writing, in open court, before counsel, and with the district attorney's consent. Our attorneys advise whether testifying before the grand jury serves the client's interests before that decision is made.

When a plea offer comes in, we evaluate the full picture: the strength of the prosecution's evidence, likely trial outcomes, and collateral consequences including immigration status, professional licensing, and housing eligibility. At the arraignment and bail hearing, our attorneys also argue against excessive bail under Article I, Section 5, which prohibits both excessive bail and cruel or unusual punishment.


4. Courtroom Representation and Trial Strategy


When a case reaches trial, strategy follows the specific facts, the assigned judge, and the practices of the prosecuting office in that borough.


Cross-Examination and Evidence Challenges

Prosecutors carry the burden of proof beyond a reasonable doubt. Our attorneys cross-examine police officers, forensic analysts, and eyewitnesses to expose inconsistencies, and challenge physical or digital evidence on chain-of-custody or collection grounds.

Protecting the Defendant'S Rights during Trial

New York Constitution Article I, Section 6 protects against self-incrimination and double jeopardy. If the defendant does not testify, the jury receives a formal instruction that silence cannot be treated as evidence of guilt.


5. Protecting Your Constitutional Rights in New York


Three provisions come up in nearly every criminal case in this state. New York's constitution matches federal protections in most areas and extends them in a few specific ones.


Searches and Wiretaps

Article I, Section 12 covers telephone communications, a protection the federal Fourth Amendment does not expressly state. New York courts have applied this provision more strictly than the federal standard in certain electronic surveillance cases, which matters in cases involving phone records or wiretap evidence.

Miranda Rights

Miranda v. Arizona is a federal rule applied in New York courts. Police must advise a suspect of their rights before any custodial interrogation. Statements taken in violation of Miranda may be suppressed, and our attorneys review every interrogation record for compliance before trial.

Due Process

Article I, Section 6 prohibits the deprivation of life, liberty, or property without due process of law. In practice, this covers the right to a fair trial, adequate notice of charges, and protection from prosecutorial misconduct at every stage.



6. Navigating NYC'S Criminal Justice System


New York City's courts and procedures differ from the rest of the state and from federal court. Each borough has its own courthouse, its own local practices, and its own prosecutorial culture.


How the Court System Is Organized

Offense typeCourtNotes
Violation or misdemeanorNYC Criminal CourtBench or jury trial
FelonyNew York Supreme CourtGrand jury indictment required
Youthful offenderFamily Court or Supreme CourtDiversion or ACD may apply

Violation or misdemeanor

  • CourtNYC Criminal Court
  • NotesBench or jury trial

Felony

  • CourtNew York Supreme Court
  • NotesGrand jury indictment required

Youthful offender

  • CourtFamily Court or Supreme Court
  • NotesDiversion or ACD may apply

Note: In New York, Supreme Court is the trial-level court. The Court of Appeals is the state's highest court.

Offense Classification and Sentencing Exposure

New York Penal Law classifies felonies from Class E to Class A-I, with Class A-I covering offenses such as murder in the first degree. Class A misdemeanors carry a maximum of one year in jail. That classification determines sentencing exposure and frames every decision about plea negotiations and trial preparation.

Domestic violence defense cases in NYC run alongside mandatory arrest protocols and order-of-protection proceedings that require separate attention. Weapons possession charges under New York Penal Law Article 265 carry strict liability provisions and enhanced penalties for repeat offenders.


7. Frequently Asked Questions


What does a criminal defense attorney do first after being retained?
Our attorneys request all available police reports and arrest records, then review them for constitutional violations that could affect what evidence the prosecution is allowed to use.

Can charges be dismissed before trial?
Yes. Suppression and dismissal motions sometimes resolve a case before it reaches a jury. Results depend on the specific facts and the nature of the legal argument.

What is the difference between a felony and a misdemeanor in New York?
A Class A misdemeanor carries a maximum of one year in jail and is tried in NYC Criminal Court. Felonies carry more than one year and go to New York Supreme Court after grand jury indictment.

Do I need an attorney even if I plan to plead guilty?
Yes. Our attorneys evaluate whether the plea offer is fair, negotiate the terms, and identify collateral consequences the prosecution will not raise on its own.


19 Feb, 2026


The information provided in this article is for general informational purposes only and does not constitute legal advice. Prior results do not guarantee a similar outcome. Reading or relying on the contents of this article does not create an attorney-client relationship with our firm. For advice regarding your specific situation, please consult a qualified attorney licensed in your jurisdiction.
Certain informational content on this website may utilize technology-assisted drafting tools and is subject to attorney review.

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