Pop star Michael Jackson is again at the centre of a police investigation. About 20 officers searched his California ranch on Tuesday as part of an ongoing but undisclosed criminal investigation. Jackson was not home. Cable channel Court TV said the investigation stems from allegations of sexual abuse brought by a 12-year-old boy against the 45-year-old Jackson. Up to 70 investigators from the Santa Barbara County sheriff's and district attorney's offices entered Jackson's sprawling Neverland Ranch outside of Santa Barbara on Tuesday morning. No immediate arrests were made. Court TV reporter Diane Dimond, who is on the scene, says a...