The boy was killed by Yang Jiaqin, a mentally ill man who failed to receive adequate treatment.

这名男孩被没有得到充分治疗的精神病人杨家勤所杀。

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According to neighbors and social workers, he is a gentle presence, possibly delusional and mentally ill, a quiet man who does not harass passers-by or panhandle aggressively.

据社区和社会工作者讲，他是一个温和的人，可能有妄想症及精神疾病，是一个安静的人，从不骚扰路人，也不是那种攻势乞讨者。

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Emboldened, Denis plucked a mentally-ill man off the streets of Paris and performed a series of blood transfusions.

丹尼斯更大胆的将巴黎街头精神病人们进行了实验。

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Tucson became a symbol of American's gun violence in 2011 when a mentally ill man opened fire at a political meet-and-greet hosted by then-Rep. Gabrielle Giffords outside a Tucson-area supermarket.

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Two years ago, a mentally ill young man shot me in the head, killed six of my constituents, and wounded 12 others.

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