Jacko's lawyer seeks to discredit accuser's sister

Michael Jackson’s defence sought today to undermine the credibility of prosecution testimony by the older sister of the boy who has accused the pop star of child molestation.

Thomas Mesereau quizzed 18-year-old student Davellin Arvizo about testimony she gave last week about a civil case in which her family sued chain store JC Penney because of an encounter with security guards.