darwin 's ruben costa impersonated police officer to find his wife and child .
he came home from work to find his wife had left with his young son .
costa called a taxi company , pretending to be a police officer searching for a woman who had abducted a child .
the taxi company were able to provide costa with his wife 's location .
costa confronted his wife at the women 's refuge where she had fled .
costa was handed a suspended sentence for his ` devious ' actions .