Anajás familicide

On Anajás, July 12, 1967, a man killed his wife, his seven sons, his grandfather and his grandmother, his five parents-in-law, and set fire to his home and escaped, killing seven more people when entering a house.

Victims
Only age known:
 * Wife, 65
 * Seven sons: 5, 10, 15, 9, 65, 11, 13
 * Grandfather and Grandmother: 87, 76
 * Parents-in-law: 48, 52, 36, 44
 * Unidentified seven: 48, 21, 26, 54, 11, 26, 36