Authorities use computer forensics to find culprit that shut down Mpls. schools

Parents dropped their children off at school Thursday morning, knowing the front door would be locked behind them. By the afternoon, the partial lockdown was over in Minneapolis public schools. What remains is uncertainty and fear caused by someone on the other side of the world. Authorities say the shooting threat came from Australia nearly 10,000 miles from Minnesota. It was posted on a social networking site. So how did police here figure out who posted the threat there?

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