I'm going to kill Baasha's family and feed their bodies to the dogs (if they lived in the city) or the birds (if they were country folk) because Baasha did evil in my sight, made me angry, and killed Jeroboam's family.
Baasha's son Elah becomes king, and is killed by Zimri
8-10 Baasha died and his son Elah became king of Israel. Elah's captain, Zimri, killed Elah while he was getting drunk, and thereby became king himself.
Zimri kills Baasha's family and friends
11-13 As soon as Zimri began to reign, he killed everyone among Baasha's friends and family that pissed against a wall, according to the word of the Lord.
Zimri is king for a week. Then he burns to death.
15 Zimri was king of Israel for a week after killing king Elah. 16 But when the people heard that Zimri killed Elah, they made their captain Omri king. Omri and everyone in Israel attacked the city of Tizrah, where Zimri was living. 18 When Zimri saw that the city was taken, he went into the king's palace and set it on fire. He died in the fire. 19 Zimri burned to death to punish him for doing evil in the sight of the Lord, behaving like Jeroboam, and causing Israel to sin.
Omri becomes king
25 Omri was evil in the sight of the Lord and was the worst person that ever existed. 26 He behaved like Jeroboam, made Israel sin, and made God angry.
After Omri dies, his son Ahab becomes king
28 When Omri died, his son Ahab became king of Israel. 30 Ahab was the worst person that ever existed. 31 He married Jezebel, worshipped Baal, and built an altar to Baal in Samaria. 33 He did more to anger God than all the kings of Israel before him.
A few more words about this episode
Everything that David did was right in God's eyes, except for the matter of Uriah. (15:5)
See here for the things that David did that were right in God's eyes and here for the matter of Uriah.
According to the saying of the Lord through the prophet Ahijah (15:29)
Jeroboam sent his wife to ask Ahijah to pray for his sick son. Ahijah said that his son would die along with all of Jeroboam's family. (1 Kings 14, Episode 138)
Because Baasha killed Jeroboam's family (16:1-7)
God will kill Baasha's family because Baasha killed Jeroboam's family - even though God wanted him to do it. (1 Kings 14:10, Episode 138)
Zimri killed everyone among Baasha's friends and family that pissed against a wall, according to the word of the Lord. (16:11-13)