Campinas massacre

Shortly before midnight on December 31, 2016, a man named Sidney Araujo entered a home where a New Year's party was taking place and opened fire at the gathering with a 9mm Walther P5 semi-automatic handgun. Araujo killed 12 relatives, including his estranged wife and his eight-year-old son, and wounded three others before committing suicide by shooting himself. Although the crime is under investigation, the motive is believed to be anger over separation with his wife. A recording of Araujo was later found in his car in which he apologizes for something that would happen, without indicating specifically what it would be.

Campinas massacre
Campinas.
Location	Campinas, São Paulo State, Brazil
Coordinates	22°54′22.6″S 47°05′40.2″W
Date	December 31, 2016 Shortly before midnight (UTC-03:00)
Attack type	Familicide Mass murder–suicide
Weapons	Walther P5 9mm pistol
Deaths	13 (including the perpetrator)
Injured	3
Perpetrator	Sidney Araujo
Motive	Uncertain