Serial killers often start young ... obsessions have them hunting for victims when they should be on the clock. Sign up here to get INSIDER's favorite stories straight to your inbox.

Can you ever tell if someone will go on to kill? Is hindsight 20/20? Or are some flags just too red to ignore? Trudeau to bring up Trump's threat to annex Canada in meeting with King Charles Fast ...

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One strange coincidence in the UK is the number of prolific serial killers who were born under the same star sign - Capricorn. The sign, which originates from the constellation of Capricornus ...