Updated: Apr 9 2021, 6:10 ET
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PHILLIP Adams concussions could have triggered a degenerative brain disease which led to a killing spree that left five people dead, an expert has claimed.
Adams fatally shot Dr Robert Lesslie, 70, his wife, Barbara, 69, and their two young grandchildren at the couple s home in South Carolina on Wednesday.
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Adams fatally shot Dr Robert Lesslie, his wife and two grandkids at the couple s home in South CarolinaCredit: AP
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Dr Hallie Zwibel said the concussions could have led to a degenerative brain disease known as chronic traumatic encephalopathy
The York County Sheriff s Office confirmed that Adams, 32, who previously played for the 49ers, killed himself in a bedroom in his parents home following the massacre.