states. newt gingrich and rick santorum are fighting romney for the conservative vote in the south. tiger woods suffered a tournament ending injury. watch him after this approach shot on the 10th hole at doral. look at him. favoring that left leg. tiger withdrew after the 11th hole. he injured that tendon in the masters last year. we begin this hour in afghanistan where an american is accused of a cold blooded killing spree. the pentagon has not released the soldier s name but says he s an army staff sergeant in his mid 30s. he served several tours of duty in iraq but on his first deployment to afghanistan. he s now in custody. u.s. custody. the military says he acted alone. here s what we know. at 3:00 a.m. local time, afghan troops reported seeing a soldier leave his army outpost near kandahar. the united states dispatched a patrol to find him but before they found him, he reached a village 15 miles away. the military says he went door to door shooting people. most of t