After receiving about 500 tips from viewers, John Walsh, host of “In Pursuit With John Walsh” on the Investigation Discovery network, believes he has narrowed down the list of possible locations Brian Laundrie could be. “We had at least three times more phone calls than we’ve had on any fugitive.” Walsh said. In just three seasons of his show, Walsh has helped authorities capture 26 fugitives and locate eight missing children. He covered the Gabby Petito investigation on his show this week. “We haven’t had this much attention since Elizabeth Smart,” Walsh said. Walsh said the tips he has received...