A couple in their late 70s gunned down their son-in-law in a California city park over the weekend, authorities said, and court documents showed the victim had been in a bitter custody dispute with their daughter. Jonathan McKinsey, a 40-year-old gaming engineer for The New York Times, was shot to death Saturday afternoon in the parking lot of a sports complex in Dublin, east of San Francisco. A police sergeant was driving nearby and saw him on the ground as witnesses began calling 911 and pointing out the couple, who were still near the scene, Dublin Police Services said in...