This is the suds law moment a father and son gun down three brothers running a car wash over a dodgy second hand car they had just bought.

The deadly shooting in Sorocaba, in the state of Sao Paulo, Brazil, on 24th May was caught on security CCTV footage as the brothers were shot down one by one.

The clip shows the father and son pulling up outside the car wash in a car and while the son goes inside his father stands guard on the pavement.

When he is confronted by two men he draws a handgun from his waistband and opens fire hitting one and forcing the other to flee.

Inside on another camera the son approaches two of the brothers as they mount a motorcycle and shakes the hand of one as if they are old friends.

Then he steps back and pulls a handgun and opens fire on both of them.

The biker is hit and falls with the motorcycle on top of him as the son hits him three times before turning his gun on the fleeing passenger.

Then the father runs and shoots the trapped biker and puts another three bullets in him at point-blank range.

Police say two brothers were killed instantly in the attack and named them as Joao Batista da Silveira Junior, 34, and 39-year-old Jackson Rodrigo da Silveira.

The third brother, named as Danilo da Silveira, 38, only survived by pretending to be dead and is recovering after emergency surgery to remove a bullet from his stomach.

Investigation head Acacio Leite said the father and son had earlier bought a car from the brothers which turned out be a dud.

Leite said: "It was not a momentary explosion of anger. There was a prior disagreement. They returned with intent."

Civil Police say they are hunting for the two gunmen.

(MJ Leidig/newsX)