'Trigger word' set off accused teacher killer, police say

A teenager accused of killing his high school math teacher told police he knocked her out with a "karate chop" before slicing her neck two times with a box cutter, a police detective said Friday in a pre-trial hearing. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ

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Видео 'Trigger word' set off accused teacher killer, police say канала WCVB Channel 5 Boston