On a May morning in 2020, as the country sank deeper into the gloom of the Covid pandemic, Daniel Weisberger murdered his little brother as he slept in the bedroom they shared.

Using a knife favored by hunters, the former Boy Scout cut his younger brother’s neck nearly in half. A medical examiner later testified that Pascal Weisberger’s death would not have been immediate, as almost half his blood drained from the 14-year-old’s body. Daniel, 17, then turned his rage on his father, a fisheries biologist. After sneaking into the room down the hall of the Upper Keys townhouse, Daniel also stabbed him in the neck.

Nearly five years later, the brothers’ family gathered in a Key West courtroom to plead for mercy for Daniel.

Daniel’s fury, they argued, was fueled by years of misdiagnosed menta

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