Police say a Crossville woman was robbed at knife point Wednesday night at the Crossings Shopping Center.  The victim told police she was in front of Burkes Outlet when a man came up behind her asking for money.  He pulled a knife on her after she told him she had no money. The victim eventually gave the robber $40 dollars and he ran off.  The subject is described as 5′ 9′ with short brown hair, black tee shirt and shorts.  Investigation continues.