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How Can Mental Health Factors Play a Role in Assault Defenses?

Zak Newman Attorney at Law April 9, 2025

Facing assault charges can be overwhelming and life-altering. The legal system is built on the principle of ensuring that those accused of crimes receive a fair trial and that their defenses are adequately considered. 

In some cases, mental health factors can play a significant role in how assault charges are handled, and these factors can be used in a criminal defense strategy. 

As a Tennessee criminal defense attorney, I have seen how mental health can influence the outcome of a case and, in some situations, provide a compelling argument for a reduction in charges or even a complete dismissal.

In this article, I’ll delve into how mental health issues can affect assault defenses in Tennessee, the legal strategies involved, and how these factors can be used to defend clients facing assault charges.

Assault Charges in Tennessee

Before exploring how mental health factors can influence assault defenses, it’s crucial to understand the basics of assault charges under Tennessee law.

Assault typically refers to intentionally, knowingly, or recklessly causing bodily injury to another person or placing them in fear of imminent harm. The severity of the charge can vary, with aggravated assault involving the use of a weapon or causing serious injury.

In Tennessee, a person convicted of assault may face serious penalties, including jail time, fines, and restitution to the victim. However, the law also acknowledges that certain circumstances, such as mental health issues, can affect an individual’s actions and therefore their criminal responsibility. 

As a criminal defense lawyer, I look at each case from every angle to see if there are mental health factors that could influence how the law applies to the individual’s situation.

Mental Health in Criminal Defense

Mental health issues can play a significant role in criminal defense, including assault cases. Tennessee law recognizes that mental health problems can affect a person’s ability to understand the nature of their actions or control their behavior. 

This can be a critical factor in defending against an assault charge, especially if the individual’s mental state played a role in the alleged crime.

One of the most common mental health defenses in criminal cases is the argument that the defendant was not in full control of their actions due to a mental illness or disorder. In cases of assault, this could mean that the individual acted in a way they would not have if they were mentally well. 

For instance, someone with a serious mental health disorder might not fully understand the consequences of their actions or may have been experiencing a severe episode during the incident that led to the alleged assault.

In such cases, the defendant may argue that their mental health condition played a direct role in the assault, and as such, they should not be held fully responsible for their actions in the same way as someone with full mental capacity. This defense strategy can be critical in reducing the severity of charges or avoiding a conviction altogether.

Mental Health Defenses in Assault Cases

Several mental health defenses can be used in assault cases. While each case is unique, there are a few common legal strategies that can be employed to argue that mental health played a role in the defendant’s actions.

Lack of Intent Due to Mental Health Conditions

In Tennessee, an essential element of an assault charge is intent. To be convicted of assault, the prosecution must prove beyond a reasonable doubt that the defendant intended to cause harm or instill fear in the victim. 

If a defendant is suffering from a mental health condition that impairs their ability to form intent, this could be a crucial defense.

For example, if the defendant has a history of severe depression or bipolar disorder, and during the alleged assault, they were in a manic or depressive state, it could be argued that they did not have the mental capacity to form the necessary intent to commit assault. 

In such cases, the defendant may not have acted out of malice or a conscious desire to harm another person but rather as a result of their mental state at the time.

By presenting evidence of the defendant’s mental health condition, it’s possible to show that they could not have intended to commit the assault, which may lead to reduced charges or even a complete dismissal.

Self-Defense and Mental Health

Another way mental health factors can play a role in an assault defense is through the argument of self-defense. Tennessee law allows for self-defense when a person believes they are in imminent danger of harm. However, the level of force used in self-defense must be reasonable and proportionate to the threat faced.

Mental health issues can affect how a person perceives a threat. Individuals with conditions like post-traumatic stress disorder (PTSD), anxiety disorders, or schizophrenia might have a distorted perception of reality, leading them to believe they are in imminent danger when they are not. 

In such cases, the defendant may have acted in self-defense, but their mental health condition influenced their judgment.

This defense can be particularly relevant if the defendant has a history of trauma or mental health episodes that impacted their ability to assess the situation accurately. If successful, it may result in reduced charges or an acquittal, as the defendant’s actions were based on their perception of an immediate threat.

Insanity Defense in Assault Cases

The insanity defense is another possible avenue for assault cases involving mental health. Under Tennessee law, an individual can plead not guilty by reason of insanity if they were unable to understand the nature of their actions or distinguish right from wrong due to a severe mental disease or defect at the time of the offense.

For a defendant to successfully use the insanity defense, there must be clear evidence that at the time of the alleged assault, they were suffering from a severe mental illness that prevented them from comprehending the consequences of their actions. 

This defense is not used frequently, as it requires substantial proof and can be difficult to establish. However, in some cases, it can be a powerful tool in securing a favorable outcome for the defendant.

If the insanity defense is successful, the defendant may not face criminal conviction but could be sent to a mental health facility for treatment instead of prison. In cases of assault, this option may be pursued if there is substantial evidence that the defendant was suffering from a severe mental health crisis during the incident.

The Importance of Expert Testimony

In any assault case where mental health is a factor, expert testimony is often crucial. Mental health professionals can provide evaluations and opinions regarding the defendant’s mental state at the time of the alleged assault. 

These experts can assess whether the defendant was suffering from a mental health condition, how that condition affected their actions, and whether it played a significant role in the alleged assault.

As your criminal defense attorney, I would work closely with these mental health professionals to gather the necessary information and present it effectively in court. 

In some cases, expert testimony can make all the difference in demonstrating that a mental health condition was a significant factor in the incident, leading to reduced charges or even dismissal.

The Impact of Mental Health Factors on Sentencing

Even if mental health factors do not lead to the dismissal or reduction of charges in an assault case, they can still play a role in sentencing. Tennessee courts are often willing to take a defendant’s mental health into account when determining penalties. 

If a defendant has a documented history of mental health issues, the court may consider this when deciding whether to impose jail time, probation, or other penalties.

In some cases, a judge may recommend that a defendant undergo mental health treatment or counseling as part of their sentence. 

This could be a better alternative to jail time, especially if the defendant’s mental health played a role in their actions. In some cases, treatment may be more effective than punishment in addressing the root causes of the defendant’s behavior.

The Importance of Legal Representation

Mental health defenses can be difficult to argue successfully without the help of a skilled criminal defense attorney. As a lawyer who specializes in criminal defense, I understand the nuances of using mental health factors in assault cases. 

I work closely with my clients to gather all the necessary evidence, consult with mental health professionals, and build a strong defense strategy tailored to the specifics of the case.

If you are facing assault charges and believe that mental health issues played a role in your actions, it’s crucial to have an experienced criminal defense lawyer by your side. Mental health factors can be pivotal in achieving the best possible outcome, whether that means reduced charges, a favorable plea deal, or a more lenient sentence.

The Next Steps

As your criminal defense attorney, I am committed to providing you with the best possible defense. I’m proud to serve the people in Chattanooga and the rest of Tennessee. Contact me at Zak Newman Attorney at Law today.