Sam and two of his friends were members of a teenage street gang. While they were returning from a dance late one evening, their car collided with a car driven by an elderly woman. After an argument, Sam attacked the elderly woman with his fists and beat her to death. Sam's two friends watched, and when they saw the woman fall to the ground they urged Sam to flee. Sam was eventually apprehended and tried for manslaughter, but the jury could not decide on a verdict. If Sam's companions are subsequently tried as accomplices to manslaughter, they should be 
acquitted, because Sam was not convicted of the offense.  acquitted, because they did not assist or encourage Sam to commit the crime.  convicted, because they urged him to flee.  convicted, because they made no effort to intervene. 