THE killer or killers of a Sydney family walked in through the front door and bludgeoned three adults and two boys as they slept in their beds, police believe.

• 如此巨大鲜血飞溅的暴力行为的现场在北埃平（地名）的林家楼上三个卧室里，警察专家昨晚试图描绘恐怖袭击事件到底是如何发生的。