Why did Absalom kill his brother Amnon?

ANSWER

Amnon raped their sister Tamar

2nd Samuel 13 :

28 Absalom ordered his men, “Listen! When Amnon is in high spirits from drinking wine and I say to you, ‘Strike Amnon down,’ then kill him. Don’t be afraid. Haven’t I given you this order? Be strong and brave.” 29 So Absalom’s men did to Amnon what Absalom had ordered. Then all the king’s sons got up, mounted their mules and fled.
Play Our Bible Trivia Game
Can You Light All 30 Candles?