Bob Shane, the last surviving original member of the popular folk group the Kingston Trio and the lead singer on its million-selling ballad “Tom Dooley” and many other hits, has died. Shane died Sunday at a hospice in Phoenix, Arizona at age 85. Mike Marvin, a cousin and surrogate son of fellow Kingston Trio founder Nick Reynolds confirmed the death but did not immediately know the cause of death. Shane, Reynolds and Dave Guard were performers in the San Francisco club circuit in the 1950s and broke through nationally in 1958 with their eponymous debut album, which featured “Tom Dooley,” an old standard inspired by a Confederate veteran’s conviction for murder. The song reached No. 1 on the Billboard pop charts, won a Grammy for best country and western song (no folk category existed) and helped launch the so-called folk revival, with other artists including Joan Baez; Peter, Paul and Mary; and, eventually, Bob Dylan. Clean cut and amiable, they were criticized by some folk artists for being too slick and for avoiding political statements. But the Kingston Trio was one of the country’s top acts over the next few years. Five Kingston Trio albums topped the Billboard charts, with favorite songs including “Where Have All the Flowers Gone?,” “500 Miles,” “It Was a Very Good Year,” later recorded by Frank Sinatra, and “Sloop John B,” later a Beach Boys hit.