Harry Stone was on one of his usual jogs in a Kansas City suburb shortly before 7:30 a.m. Sunday when an approaching car slowed down and a passenger shot him. The vehicle kept going without stopping, and Stone, 60, later died at a hospital. Nearly a week later, police in Raytown, Missouri, say they have no suspects, and no one has any idea why he was targeted. He wasn’t robbed. He didn’t have any known enemies. And a gang-initiation hit appears implausible, Raytown police Capt. Ted Bowman said. “Even grasping at straws and imagining motives, we have been able to...