Minor odds...

Two neighbors families separated by the street. The man and his wife clean the snow and throw it on the street, and the neighbor warned them not to throw the snow near his home
The quarrels and bad words between them took place until the neighbor went to his house and brought a gun and killed the two in the middle of the street
The neighbor went home and brought the automatic gun powder and threw them again to finish them off
The killer even killed himself before they arrested him

The quarrel ended with the killing of the three people, each of the man, his wife and the neighbor