(By Ely Portillo and Cleve R. Wootson Jr., elyportillo@charlotteobserver.com; cwootson@charlotteobserver.com) A foot chase under the glare of a police helicopter's spotlight ended with an officer and a robbery suspect shooting each other early Sunday, witnesses and police said.Police were pursuing Malcolm Xavier Springs, 20, shortly after 1a.m. in connection with a robbery and another shooting when he exchanged gunfire with the officer, police said.