If you’ve recently found yourself entangled in a criminal case in Indiana, chances are you’ve heard the term “probable cause.” But what does it really mean, and why is it so essential to your case? Whether you’re facing criminal charges, have been stopped for questioning, or are simply looking to understand your rights, an awareness of probable cause is key to navigating Indiana’s criminal justice system.
This guide covers what probable cause entails, legal definitions, real-life Indiana case examples, and what you can do if your rights have been violated. By the end, you’ll have a clearer grasp of how probable cause works and the power it holds in shaping the outcomes of criminal cases.

What Is Probable Cause?
Probable cause forms the backbone of law enforcement actions like arrests, searches, and the issuance of warrants. At its core, probable cause is a reasonable belief, based on facts and circumstances, that a crime has been committed. Unlike the “beyond a reasonable doubt” standard required for convictions, probable cause is a much lower threshold, but it still must be backed by objective evidence.
Legal Basis of Probable Cause
The Fourth Amendment of the United States Constitution provides the framework for probable cause, stating that individuals have the right to be secure against unreasonable searches and seizures. This principle is mirrored in Indiana state law, ensuring that law enforcement must justify their actions to uphold citizens’ rights.
Probable cause isn’t required in all interactions with law enforcement, however. For example, law enforcement only needs reasonable suspicion to conduct a brief investigative detention (e.g., a traffic stop). Reasonable suspicion is a lower standard that merely requires a logical inference based on observed behavior, whereas probable cause necessitates a stronger evidentiary basis of criminal activity.
Scenarios That Illustrate Probable Cause
To better understand probable cause, let’s take a look at a few examples that illustrate when it is and isn’t established in Indiana criminal cases.
When Probable Cause Is Established
● An Officer’s Observations
If a police officer pulls over a vehicle for erratic driving and smells alcohol on the driver’s breath, along with noticing slurred speech, these observations could establish probable cause for a DUI arrest.
● Informants With Proven Credibility
An Indiana case, State v. Downs, emphasized that an informant’s reliability plays a significant role in establishing probable cause. When an informant with a history of accurate tips reports drug activity in a specific location, law enforcement may proceed with obtaining a warrant.
● The Totality of the Circumstances
A principle derived from the U.S. Supreme Court case Illinois v. Gates, Indiana courts often consider “the totality of the circumstances” when weighing probable cause. For example, if officers verify details of an anonymous tip through independent investigation, it may suffice to establish probable cause for action.
When Probable Cause Is Not Established
● Anonymous Tips Without Verification
Courts often reject cases where law enforcement relies solely on an unverified anonymous tip. For instance, if an unnamed caller reports suspected illegal activity without offering specific, credible details, probable cause is likely lacking.
● Pretextual Traffic Stops
The Indiana case Jellison v. State addressed probable cause in traffic stops. If a stop is based on vague or unfounded suspicion rather than an observable traffic violation or other concrete evidence, it may not pass the probable cause threshold.
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How Is Probable Cause Used to Obtain a Warrant?
When law enforcement seeks a warrant to conduct a search or make an arrest, they must first present an affidavit to a judge or magistrate. This affidavit must contain sufficient facts to establish probable cause, detailing the evidence and observations that justify the warrant.
The judge or magistrate then evaluates the affidavit using the “totality of the circumstances” test to determine whether probable cause exists. If the affidavit lacks sufficient evidence or contains questionable claims, the warrant request may be denied.
Case Study Example
One Indiana case, Peterson v. State, highlights the role of an officer’s experience in establishing probable cause. An officer observed what appeared to be a drug transaction based on specific movements and patterns of behavior. Using their expertise, they filed an affidavit that justified issuing a search warrant. The court upheld the warrant, citing the officer’s trained observations as valid probable cause.
What If Your Rights Are Violated Due to a Lack of Probable Cause?
If you believe that law enforcement acted without probable cause in your case, you’re not without recourse. The legal system provides several safeguards to protect your rights, including the Exclusionary Rule, which prevents illegally obtained evidence from being used in court.
Steps to Take
- Consult a Criminal Defense Lawyer – A seasoned criminal defense lawyer can review your case and identify whether a lack of probable cause played a role in your arrest, search, or charges.
- Challenge the Validity of a Warrant – If evidence against you was obtained through a warrant, your attorney can examine the affidavit supporting the warrant. If probable cause was insufficient, the warrant (and any evidence it produced) may be invalidated.
- File a Motion to Suppress Evidence – Under the Exclusionary Rule, evidence obtained during an unlawful search or seizure can be suppressed, meaning it cannot be introduced in court.
- Seek Remedies for Civil Rights Violations – If your constitutional rights were violated, you may have grounds to file a civil lawsuit against the responsible party.
Common Misconceptions to Watch For
It’s essential to separate fact from fiction when it comes to probable cause. Here are a few misconceptions to be aware of:
- “Any anonymous tip provides probable cause.” False. Tips need corroboration or other indicators of reliability to be valid.
- “A warrant is foolproof.” False. Warrants can be challenged if they are not supported by sufficient probable cause.
- “Probable cause equals conviction.” False. Probable cause justifies an arrest or search, but it does not guarantee guilt or foresee the trial’s outcome.
RECAP
Probable cause isn’t just a legal technicality; it’s a critical safeguard that protects citizens from unjust persecution. Whether you’re facing criminal charges, dealing with invasive searches, or navigating traffic stops, knowing your rights under probable cause can make a world of difference.
If you believe your rights have been violated or you need expert advice, don’t wait. Contact Attorney David E. Lewis today to speak with an experienced Indiana criminal defense lawyer. We are here to ensure your rights are protected every step of the way.
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