Children are living in a dangerous online world packed with predators, and parents must be vigilant to keep their children safe, according to Det. Andrew Shore of the NYPD Computer Crimes Squad. "Children are exposed," said Shore. "We get hundreds of tips a month. Some of the cases really get to you." The number of child exploitation tips to the National Center for Missing and Exploited Children doubled last year to more than 18 million. So how should you police their children on the internet when you’re not a computer crimes detective? Read more: 4.nbcny.com/np0rYfX NBC 4 New York on Twitter: 4.nbcny.com/kAuuwUN NBC 4 New York on Facebook: 4.nbcny.com/mbeh714 NBC 4 New York on Instagram: 4.nbcny.com/g5YlkcI NBC 4 New York on Youtube: 4.nbcny.com/iTUpy5e #NYPD #OnlineSafety #News #ITeam