Wisconsin Man Convicted of Killing Brother After Paranoid Delusions

Brandon Smith shot his younger brother Justin after believing he was in an intimate relationship with Smith's ex-wife.

Apr. 3, 2026 at 5:22pm

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An extreme close-up photograph of a single bullet casing against a pitch-black background, capturing the stark, gritty details of the object in dramatic lighting to conceptually represent the violent crime at the heart of this story.A single bullet casing, the only physical evidence left behind from a deadly family dispute fueled by paranoia and mental health struggles.Today in Milwaukee

A Wisconsin man has been found guilty of fatally shooting his brother in the chest after believing the victim was being 'intimate' with the suspect's ex-wife and wanted to kill him. Brandon Smith, 51, was convicted of first-degree reckless homicide in the death of his 41-year-old brother Justin Smith in the early morning hours of February 26, 2025 at their Milwaukee home.

Why it matters

This tragic case highlights the dangers of unchecked mental health issues and the potential for violence when paranoid delusions go unchecked. The shooting occurred after the suspect's mother said he had become more paranoid and was exhibiting signs of mental illness, raising questions about access to mental health resources and intervention.

The details

According to the criminal complaint, Brandon Smith believed his brother was monitoring him through his cell phone and was going to kill him, though he admitted he never actually saw anyone else in the home. During an argument in the early morning hours, Brandon Smith grabbed a hammer and confronted his brother Justin in the kitchen, hitting him twice in the head. When Justin went to his bedroom, Brandon retrieved a gun and shot him in the chest, refusing to let their mother call 911 for help.

  • The shooting occurred around 4 a.m. on February 26, 2025.
  • Brandon Smith is set to be sentenced on June 5.

The players

Brandon Smith

A 51-year-old Wisconsin man who was found guilty of first-degree reckless homicide in the shooting death of his younger brother.

Justin Smith

The 41-year-old younger brother of Brandon Smith who was fatally shot by his brother.

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What’s next

Brandon Smith is set to be sentenced on June 5.

The takeaway

This tragic case underscores the urgent need for improved access to mental health resources and early intervention to prevent violence stemming from unchecked paranoia and delusional beliefs.