John Deering (murderer)

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John W. Deering (September 1898 – October 31, 1938) was a convicted murderer who was the subject of an experiment to observe what would happen to the human heart during death by gunshot. Deering, an American facing execution by the state of Utah for the May 1938 murder of Oliver R. Meredith Jr., volunteered to have himself hooked up to an electrocardiogram while he was shot by a firing squad. The test indicated that his heart stopped in about 15 seconds of being hit, although other bodily functions, such as breathing, continued for a longer period of time.

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