China has executed a former top justice official in the city of Chongqing as part of a crackdown on corruption. Wen Qiang, former director of the Chongqing Municipal Judicial Bureau, was the highest-ranking official charged in connection with the scandal.He was convicted of accepting bribes, rape and shielding criminal gangs. Dozens of officials have been charged as part of the clampdown, initiated by Chongqing's Communist Party boss Bo Xilai.