SHIPSHEWANA, Ind. — Loren and Eva Schlabach lost their only son in a traffic accident on a clear summer day more than two years ago. Today, their pain remains so unbearable that they might be willing to risk losing their community to find justice. At 12:17 p.m. on July 9, 2012, while Loren was at work, Eva, then 25, held the reins of the family’s horse-drawn buggy east on Route 120, about three miles north of Shipshewana, with their two daughters and son. They were moving through an S-shaped curve in the …