DARTMOUTH, Mass. (AP) -- Edmund Dinis (duh-NEEZ'), the former district attorney who oversaw the investigation into the late Sen. Edward Kennedy's involvement in the Chappaquiddick case, has died at age 85. Henry Arruda, general manager of the radio station Dinis owned, says the former prosecutor died Sunday at an assisted-living center in Dartmouth, Mass. Dinis was voted out of office in 1970, the year after Kennedy's car went off a Martha's Vineyard bridge into a pond with campaign worker Mary Jo Kopechne inside.