A British corporate investigator linked to a bribery scandal in China involving drugmaker GlaxoSmithKline PLC is to be released early from a 2 1/2-year sentence in a Chinese jail, a source close to his family said on Tuesday. Peter Humphrey and his American wife, Yu Yingzeng, were sentenced in August last year for illegally obtaining private records of Chinese citizens and selling the information on to clients including GSK.