What Does a Criminal Defense Attorney Do in an Illinois Criminal Case?

A criminal defense attorney’s real job is not reactive. It is preventative, strategic, and continuous. Here is what actually happens at every stage of a criminal case, and why each phase matters.

The Complete Criminal Case Process in Sangamon County Explained

A criminal case may move through some or all of these stages:

1. Investigation or police contact
2. Arrest, citation, or filing of charges
3. Initial court proceedings and pretrial release
4. Arraignment and plea
5. Discovery and defense investigation
6. Pretrial motions
7. Plea negotiations or other resolution discussions
8. Trial preparation
9. Bench or jury trial, when necessary
10. Sentencing after a conviction or guilty plea
11. Appeal or other post-judgment proceedings when available

Not every case goes through every stage. A charge may be dismissed, negotiated, or otherwise resolved before trial.

Illinois Criminal Case Timeline: What Happens Next?

Stage	What Happens	Attorney Role
Investigation	Police collect evidence and determine whether charges may be filed.	Protects rights, manages communication, and identifies weaknesses.
Arrest	Police take custody and begin criminal processing.	Reviews procedures and protects against harmful mistakes.
Pretrial Release	The court decides release conditions.	Argues for reasonable conditions and protects freedom before trial.
Charges Filed	The defendant appears in court and responds to allegations.	Reviews charges, evidence, and defense options.
Resolution	The case may resolve through dismissal, negotiation, or trial.	Builds strategy based on evidence and goals.

What a Criminal Defense Attorney Does at Each Case Stage

A criminal defense attorney’s role changes as the case moves forward. Early stages often focus on preventing mistakes and protecting release, while later stages focus on evidence, negotiation, trial preparation, sentencing, or post-conviction options.

Case Stage	What the Defense Attorney May Do	Why It Matters
Investigation	Advise the client, manage police contact, preserve evidence, and evaluate possible charges.	Statements and evidence created before charges may affect the entire case.
Arrest and initial proceedings	Review the arrest, explain the charge, address pretrial release, and identify immediate evidence issues.	Early court orders may affect custody, contact, travel, weapons, and other conditions.
Arraignment	Review the formal charge and advise the defendant concerning the plea and next steps.	The defendant is formally informed of the charge and called upon to plead.
Discovery and investigation	Review police reports, recordings, witness evidence, forensic evidence, and other discovery.	The defense can identify factual weaknesses and legal issues before deciding how to proceed.
Pretrial motions	Raise appropriate challenges involving evidence, searches, statements, procedure, or other legal issues.	Court rulings may affect what evidence can be used and how the case proceeds.
Negotiation	Evaluate offers, discuss risks, and negotiate when doing so serves the client’s interests.	The client can compare a proposed resolution with the risks of continuing toward trial.
Trial	Challenge the State’s proof, examine witnesses, present admissible defense evidence, and make legal arguments.	The prosecution retains the burden of proving the charge beyond a reasonable doubt.
Sentencing or post-judgment proceedings	Present mitigation and evaluate available post-judgment or appellate options.	Additional legal issues may remain even after a plea, verdict, or sentence.

What a Defense Attorney Does Before Charges Are Filed

A defense attorney may become involved before an arrest or formal charge.

During an investigation, an attorney may:

• Advise the client before police questioning
• Communicate with investigators
• Review requests for consent to search
• Preserve potentially useful evidence
• Identify witnesses
• Evaluate possible charges and defenses
• Advise the client about future police contact

Early representation does not guarantee that charges will be avoided. Its purpose is to protect the client’s rights and prevent unnecessary mistakes while the investigation is still developing.

What a Defense Attorney Does Immediately After an Arrest

After an arrest, a defense attorney may:

• Review the alleged offense and arrest circumstances
• Explain what the client should and should not discuss
• Identify upcoming court dates
• Address immediate pretrial release issues
• Preserve recordings, photographs, messages, or other evidence
• Determine whether a search, seizure, or statement requires closer legal review

An arrest is not a finding of guilt. The prosecution still bears the burden of proving the charged offense.

Why Pretrial Release Can Affect the Entire Criminal Case

Pretrial release determines whether a defendant remains out of custody while the criminal case proceeds and what conditions may apply.

A defense attorney may review:

• Whether the State is seeking detention
• Whether detention is authorized for the charged case
• Release conditions
• No-contact provisions
• Travel or weapon restrictions
• Alleged violations of existing conditions

Illinois law permits denial of pretrial release only in circumstances authorized by Section 110-6.1 and after the required hearing. For more detail about custody decisions, review how Illinois pretrial release and detention rules work.

Common Mistakes That Hurt Criminal Defense Cases

Common mistakes after police contact or arrest include:

• Discussing the allegations with police without legal advice
• Consenting to searches without understanding the consequences
• Posting about the case online
• Contacting an alleged victim or witness contrary to a court order
• Missing court
• Violating release conditions
• Destroying or altering potentially relevant evidence
• Accepting a plea before understanding the charge and available evidence

A defense attorney can explain which actions are legally required and which may create additional problems while the case is pending.

What Happens at an Arraignment in Illinois Criminal Court

At arraignment, the defendant is informed of the formal charge and called upon to enter a plea.

Illinois law provides that a defendant called upon to plead is furnished with a copy of the charge and may plead guilty, guilty but mentally ill, or not guilty. If the defendant stands mute, a not-guilty plea is entered.

A defense attorney can review the charge, explain the plea being entered, and identify the next procedural steps.

What a Defense Attorney Does After Charges Are Filed

Once charges are filed, the attorney’s work generally shifts from preventing investigative mistakes to analyzing the State’s case.

The attorney may:

• Review the charging document
• Explain possible penalties
• Obtain discovery
• Review police reports and recordings
• Investigate factual disputes
• Identify search, seizure, or statement issues
• Review pretrial release conditions
• Evaluate plea offers
• Prepare appropriate motions
• Prepare for trial when necessary

The exact sequence depends on the type of charge and how the case develops.

How Defense Attorneys Analyze and Challenge Evidence

This phase determines whether the prosecution’s case holds up.

A criminal defense attorney:

• Reviews police reports line by line
  
• Examines body camera footage and surveillance
  
• Tests timelines for inconsistencies
  
• Interviews witnesses while memories are fresh
  
• Uses investigators or experts when needed
  

Evidence review helps determine what the State can prove, what evidence may be challenged, and whether factual inconsistencies or legal problems affect the prosecution’s case.

If the charge involves DUI evidence, visit the DUI defense attorney in Springfield, IL page. If the case involves a traffic stop search, read when police can search your car during a traffic stop in Illinois.

How Pretrial Motions Can Weaken or Dismiss Criminal Charges

Depending on the facts and law, pretrial motions may address:

• Evidence obtained through an allegedly unlawful search or seizure
• Statements alleged to have been obtained unlawfully
• Evidentiary disputes
• Procedural issues
• Other legal questions that must be decided before trial

A successful motion may restrict evidence or otherwise affect the prosecution, but filing a motion does not guarantee dismissal. If the case involves evidence obtained through a warrant, review how Illinois search warrants work and when evidence may be challenged.

How Criminal Defense Negotiations Reduce Charges and Penalties

A defense attorney evaluates plea offers by comparing the proposed resolution with the evidence, possible defenses, sentencing exposure, collateral consequences, and risks of proceeding to trial.

An attorney may negotiate over charges, sentencing recommendations, supervision or other available dispositions when legally applicable.

Negotiation does not guarantee that a charge or sentence will be reduced. The client ultimately decides whether to accept or reject a plea after receiving legal advice.

How Defense Attorneys Prepare Criminal Cases for Trial

Even cases that settle prepare for trial.

Your lawyer:

• Builds a clear defense narrative
  
• Prepares cross-examination of every witness
  
• Anticipates prosecution tactics
  
• Identifies jury risks and themes
  

Trial readiness creates leverage. Unprepared cases lose it.

What Happens During a Criminal Trial in Illinois

Before trial, the defense may prepare witnesses, exhibits, evidentiary issues, cross-examination, legal arguments, and the overall theory of the case.

At trial, a defense attorney may:

• Participate in jury selection when the case is tried before a jury
• Cross-examine prosecution witnesses
• Object to improper evidence or argument
• Present admissible defense evidence when appropriate
• Make opening and closing arguments
• Raise legal issues during the proceeding

The State bears the burden of proving the charged offense beyond a reasonable doubt.

What a Defense Attorney Does at Sentencing

If a defendant is convicted or enters a guilty plea, the defense attorney may present legally relevant mitigation and argue for an appropriate sentence.

Sentencing work may involve:

Preserving appropriate legal issues for further review

Reviewing the statutory sentencing range

Correcting inaccurate information

Presenting mitigating circumstances

Addressing employment, treatment, family, or community information when relevant

Responding to aggravating evidence

Post-Conviction Options After a Criminal Case in Illinois

Some legal issues may continue after judgment or sentencing.

Depending on the case, counsel may evaluate:

• Post-trial motions
• Appeal rights
• Post-conviction remedies
• Sentencing issues
• Record-sealing or expungement eligibility when applicable

These remedies have different requirements and deadlines, so they should not be treated as interchangeable.

Related Criminal Defense Resources

• Criminal Defense Attorney in Springfield, IL
• How Sangamon County Circuit Court Handles Criminal Cases
• First Arrest in Springfield, Illinois
• SAFE-T Act and Pretrial Detention in Sangamon County
• How Plea Bargains Work in Illinois Criminal Cases

Frequently Asked Questions About Criminal Defense Cases in Illinois

What does a criminal defense attorney do in an Illinois criminal case?

A criminal defense attorney advises and represents the defendant throughout the case. Depending on the stage, the attorney may handle police contact, review charges and evidence, address pretrial release, file motions, negotiate with prosecutors, prepare for trial, represent the client at trial, and address sentencing or post-judgment issues.

Can a criminal defense attorney help before charges are filed?

Yes. An attorney can advise a person during an investigation, communicate with law enforcement, address requests for interviews or searches, preserve evidence, and help the client avoid statements or actions that may harm the defense.

What does a defense attorney do after an arrest?

After an arrest, the attorney may review the arrest circumstances and charge, explain the client’s rights, address pretrial release issues, preserve evidence, identify upcoming court dates, and begin evaluating possible defenses.

What does a criminal defense attorney do at arraignment?

At arraignment, the attorney reviews the formal charge, advises the defendant about the plea being entered, and explains the next stages of the case. Illinois law requires the defendant to be informed of the charge and called upon to plead.

How does a defense attorney challenge criminal evidence?

An attorney may review police reports, recordings, witness statements, physical evidence, searches, statements, forensic evidence, and procedural issues. When legally appropriate, the attorney may file motions asking the court to restrict or suppress evidence.

Does hiring a criminal defense attorney mean my case will go to trial?

No. Criminal cases may be dismissed, negotiated, resolved through a plea, or proceed to trial. A defense attorney evaluates the evidence and available options so the client can make informed decisions throughout the case.

Who decides whether to accept a plea bargain?

The defendant decides whether to accept or reject a plea offer. A defense attorney explains the proposed agreement, possible consequences, evidence, defenses, and risks so the client can make an informed decision.