The first report, that 50 or so graves had been disturbed at the historic Burr Oak Cemetery in Alsip, Ill. the final resting place of civil rights icon Emmett Till, and the singer Dinah Washington was grotesque. But by week’s end, the macabre tally had grown: Nearly 300 graves, possibly more, were destroyed in an apparent grave-resale scheme that took in an as yet unknown amount of money.