In the 1 Kings, We have man of God from Judah, who came to Bethel to warn Jeroboam and ends up getting killed on his way out by an Old Prophet who lied to him.
1 Kings 13:18
New International Version (NIV)
18: The old prophet answered, “I too am a prophet, as you are. And an angel said to me by the word of the Lord: ‘Bring him back with you to your house so that he may eat bread and drink water.’” (But he was lying to him.)
23: When the man of God had finished eating and drinking, the prophet who had brought him back saddled his donkey for him.
24: As he went on his way, a lion met him on the road and killed him, and his body was left lying on the road, with both the donkey and the lion standing beside it.
Obviously this is a jerk move on the Prophet's part. Lying to the man of God and getting him killed.
What justifies this man's actions? I have not read anything that points to his punishment for lying. What was the reason for the Prophet's actions?