Act3 Scene1

Romeo, Mercutio and Benvolio are walking down a road when they see Tybalt.  Romeo tries to calm him down, but a fight still broke out, resulting in Mercutio's death.  Tybalt leaves, then returns and fights Romeo.  Romeo kills Tybalt and leaves fearing a death penalty.  Later, the Prince finds out what happened and forces Romeo to leave the city.