(Vancouver, WA)  --  Clark County investigators are looking for a woman with purple hair in connection with a bank holdup in Vancouver.  Deputies say the woman walked into a Chase bank branch on Highway 99 around five p.m. yesterday.  She handed the teller a note demanding money and left the bank with an undisclosed amount of cash.  The woman, who's described as five-feet-three and heavy-set, was wearing a dark-blue jacket, jeans, and white Adidas.