What Is Causation and Concurrent Causation in a Homicide Case?

Short Answer

Start with this question: Would the death have occurred without the alleged conduct? Under Texas Penal Code §6.04(a), the conduct can cause the result by acting alone or together with another cause. The latter is concurrent causation. A second cause does not automatically remove criminal responsibility. The exception applies only when that other cause was clearly sufficient to produce the result and the defendant’s conduct was clearly insufficient.

Section 6.04(b) addresses a difference between the result a person desired, contemplated or risked and what actually happened. The person remains criminally responsible for causing the result if the only difference is that a different offense occurred, or a different person or property was injured, harmed or otherwise affected. The medical evidence and the rest of the factual record determine how these provisions apply to a particular case.

Calling a death an accident or a homicide does not resolve the charged elements. The State must prove its theory beyond a reasonable doubt. Examine what happened, the accused’s perceptions or intent and any reasonable competing explanation supported by the full record.

Why This Question Matters

When a person is investigated or charged in connection with a death, families often search for a quick answer. I understand that urgency. But in a murder case, the most responsible answer begins with the actual charging document, the procedural stage and the evidence that can be verified. Two cases carrying the same label may involve entirely different facts, legal theories, experts and trial decisions.

In evaluating this issue, I would focus first on the precise element, timing, source reliability, alternative explanations, missing evidence, inconsistent accounts and whether expert or digital evidence supports the inference the State asks the jury to draw. That review should begin early. Recordings may be overwritten, electronic data may be lost through ordinary retention cycles, memories may change, and a family can unintentionally create additional evidence by discussing the case on recorded calls or social media.

Reading an Autopsy That Lists Two Conditions

For a hypothetical autopsy listing a gunshot wound and untreated heart condition, test both §6.04(a) requirements against the full findings and timeline. The State still has to prove causation beyond a reasonable doubt in a Texas murder case.

How I Would Analyze the Issue

An examiner’s summary should lead back to the full findings. Reports and screenshots likewise need checking against recordings and original files. Identify the source supporting each legal requirement and account for missing or unproduced material.

The next step is to build a chronology that can be tested. Times, locations, calls, messages, witness accounts, medical events and evidence-handling records should be placed on one timeline. Conflicts do not automatically prove innocence or guilt, but they identify where investigation, legal research or expert review may be necessary.

I also prepare with trial in mind while continuing to evaluate every lawful resolution. That does not mean every case will be tried. It means advice about risk, negotiation and client decisions should be based on preparation rather than assumption.

Reading the Medical Findings Against the Timeline

A timeline should connect the full medical findings with the records that support them. Use it to work through four questions:

1. What does the examiner identify as the cause of death, and which findings support that conclusion?
2. Would the death have occurred without the conduct alleged?
3. Was another cause operating with that conduct?
4. Was the other cause clearly sufficient to produce the result, and the alleged conduct clearly insufficient?

The fourth question tests both parts of the statutory exception. The medical opinion supplies evidence; §6.04 supplies the legal test for assessing the facts.

What the Prosecution May Try to Establish

The prosecution will ordinarily try to connect the charged legal theory to a coherent factual account. On this issue, that may include testimony, physical evidence, recorded statements, digital records, medical findings or expert opinions directed toward the precise element, timing, source reliability, alternative explanations, missing evidence, inconsistent accounts and whether expert or digital evidence supports the inference the State asks the jury to draw. The State may argue that separate pieces of circumstantial evidence reinforce one another even when no single item answers the entire question.

The report’s terminology cannot do the work of proof. Check lawful collection and preservation, the witness’s opportunity to observe and the limits of the expert’s discipline. Compare the prosecution’s account with significant contrary facts as well as the facts it emphasizes.

Applying the Causation Test

The prosecution may rely on medical testimony to explain why the death would not have occurred without the alleged conduct, whether it acted alone or with another cause. It may also argue that the statutory exception does not apply. Check both parts of that account against the underlying records and the wording of §6.04.

Testing the Medical Report

Assess admissibility, reliability and weight separately, using the report’s sources, methods and timeline. Check negative results, untested reasonable possibilities, preservation of contradictory evidence and favorable disclosures. Base alternatives on evidence, without invented suspects or explanations.

Checking the Expert’s Records and Assumptions

Trace each expert conclusion back to its records, methods and assumptions. Are records missing? What evidence supports the other possible causes? Counsel must consider those answers under §6.04. Calling an injury a contributing cause does not, by itself, establish legal causation. Finding another condition does not automatically break the causal connection either.

Records for the Causation Review

• Scene evidence
• Medical findings
• Communications
• Video
• Device and location records
• Witness accounts
• Timelines
• Expert data
• Evidence of other plausible actors or causes

Questions That Can Change the Analysis

Questions About the Charge and Record

• What does the indictment, complaint or warrant actually allege?
• Which facts come from an original recording or file, and which come only from a summary?
• What evidence is missing, incomplete, unreadable or preserved in the wrong format?
• Did a witness’s account change after speaking with other people or reviewing media?
• What assumptions did an investigator or expert use, and are those assumptions supported?
• Does another explanation fit the verified facts without speculation?

Questions About Causation

• What does the examiner say happened, and where is the supporting evidence in the records?
• Was another illness, injury or event contributing to the death at the same time?
• Without the conduct alleged, would this death still have occurred? What evidence supports the answer?
• Can the evidence show both that the other cause was clearly sufficient and that the defendant’s conduct was clearly insufficient?

Common Misunderstandings

• A person’s silence, fear or unusual behavior does not automatically establish guilt.
• A defense lawyer does not need to prove a complete alternate case before testing whether the State met its burden.
• Trial preparation and negotiation are not opposites. Careful preparation is what makes advice and negotiation informed.
• An arrest or indictment is an accusation, not proof that every alleged fact is true.

A family may hear that there was another cause and assume the charge cannot stand. Section 6.04 does allow more than one cause to operate together.

An examiner can explain the medical findings. Counsel must still work through the legal test using those findings and the other evidence.

A second factor is not enough. Section 6.04(a)’s exception requires a clearly sufficient other cause together with clearly insufficient conduct by the defendant. Both findings need support.

East Texas Murder Case Considerations

A city name in a news report or jail listing may tell only part of the jurisdictional story. The case may proceed in a county district court or involve more than one jurisdiction. Use official records to confirm the county, cause number, court, indictment, prosecutor, custody location and investigating agencies.

Local knowledge can help counsel understand court procedures, travel, access to records and the agencies commonly involved. It is not a substitute for statewide criminal-law knowledge, independent investigation, qualified experts and serious trial preparation. The defense plan should be built from the evidence and law governing the particular case.

Confirm the court and case number. Where the death was investigated helps identify the agencies and medical examiner involved. Find out which of their records and opinions the State is using to explain the cause and manner of death.

What to Keep and How to Share It

Keep these materials for counsel:

• Booking papers
• Court and account notices
• Warrants
• Relevant communications
• Names of agencies and investigators

Give witness information privately. Preserve devices and accounts; do not contact an alleged victim, coach witnesses, coordinate stories or discuss facts on recorded jail calls.

If you have medical or autopsy records, keep them. The same goes for treatment records, photographs, toxicology materials and documents showing how evidence was handled. Do not mark up or change the originals. Keep a separate note of where each copy came from, and give the records privately to your defense lawyer.

Talk With Heath Hyde About a Serious Homicide Matter

Counsel may need the underlying records and methods, not just the conclusion, to evaluate the charged theory, since the medical opinion and the legal test are different things. Those records also bear on how intent is proven or disputed.

An interview request, executed warrant, arrest or approaching court date deserves prompt attention from qualified counsel. Call Heath Hyde, P.C. at 903.439.0000 for a confidential consultation. Bring the official papers, person’s full name, listed charge, court and next deadline, with the facility and booking number if applicable. Ask how to deliver confidential evidence before using a general form.

Causation Questions

Does another contributing cause always defeat a murder charge?

No. The §6.04(a) exception requires both:

• The other cause was clearly sufficient to produce the result.
• The alleged conduct was clearly insufficient.

Identifying a second cause establishes neither of those points by itself.

Is medical cause the same as legal cause?

No. The examiner explains the medical findings. Counsel must assess that opinion alongside the other evidence under §6.04 to address legal causation.

Can causation be decided from a short summary?

Usually not. A summary may give the expert’s conclusion without the supporting records, methods or timeline. Counsel needs to review those details together with the theory charged.

Frequently Asked Questions

Does the same answer apply in every Texas murder case?

No. The indictment, procedural stage, facts, evidence, court and governing law can materially change the analysis.

Can one piece of evidence decide the case?

Sometimes a single item is very important, but it must still be authenticated, placed in context and compared with the rest of the record.

When should the defense begin investigating?

As early as reasonably possible. Evidence can disappear through ordinary retention, memories can change and deadlines can limit available options.

Should family members investigate witnesses themselves?

They should give names and information privately to counsel. Direct contact can create witness, safety, privilege and evidence problems.

Does preparing for trial mean the case cannot be resolved?

No. Trial preparation allows the lawyer and client to evaluate the evidence, risks and lawful resolution options from an informed position.

Legal Sources

Texas Penal Code §§6.03–6.04: https://tcss.legis.texas.gov/resources/PE/htm/PE.6.htm

Texas Penal Code §19.02: https://tcss.legis.texas.gov/resources/PE/htm/PE.19.htm

This article provides general educational information, not legal advice. Every case depends on its facts, evidence, court, deadlines and governing law. Past results do not guarantee a similar outcome.