Sky News Australia | Child killer Derek Percy maintains silence on schoolgirl Linda Stilwell's murder NEWS.com.au CHILD killer Derek Ernest Percy should assist police in the case of murdered schoolgirl Linda Stilwell, Chief Commissioner Ken Lay says. Today, the family of the Melbourne girl who went missing 45 years ago say they are not surprised dying killer Derek ... Percy denies having killed Linda Stilwell Percy offers no answers in bedside hearing Child killer Derek Percy maintains silence on schoolgirl Linda Stilwell |