TAMPA — When the sixth grader jokingly dared him to shoot Saturday night, Jose Cruz, Jr., went ahead and pulled the trigger. He thought the .357 revolver was empty, he told Tampa police. It was not. The bullet struck Stephenn Santiago-Grey, 14, in the chest. He collapsed in the driveway of his house at 4611 E Whiteway Drive. Several people called 911. He died at Tampa General Hospital.