PT, police dispatch logs reported the sound of a single gunshot from inside the residence.

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He took his experience designing dispatch systems for police cars and taxis and enabled individuals to similarly broadcast their location and intention using Twitter.

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"Heading to Watertown, " the voice said over police dispatch.

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Making sure every 911 dispatch center and every fire and police station in the country is ready for Y2K is too large of a task for any one agency.

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