And so they fight. True to his word, Romeo kills Tybalt.
STAB
Man, I've done goofed.
Romeo, run!
Tybalt is right there, lying dead.
Where's Tybalt?
What happened here? Who's responsible for this?
Here's what happened: Tybalt killed Mercutio because Romeo wouldn't fight with him. Romeo got mad and killed Tybalt and then ran away. That's the truth.
Tybalt! My poor cousin! The blood of my family has been spilled.
For killing Tybalt, I am banishing Romeo to Mantua when we find him.
Romeo was Mercutio's friend. Tybalt deserved to be killed as revenge.