Abel Cedeno testified that, after years of bullying, he feared for his life when he fatally stabbed a classmate who had punched him.

On a September morning two years ago, Abel Cedeno put on a pink Kylie Minogue shirt, and then tossed his books and inhaler into his backpack.

Just before leaving for school that day, he took a switchblade knife he had bought online from the top of his dresser and placed it in his pocket.

Within a few hours, the then 18-year-old senior had fatally stabbed Matthew McCree, 15, and permanently maimed Ariane LaBoy, 16, in a history

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