when gang members are identified, eliminate them
But what if the identification was wrong?
Just look at how the profiling is done. From TFA:-
One of the features of Orca is an algorithm – a set of rules – that assigns each member of the network a probability of belonging to a particular gang. If an individual admits to this, the assignment can be awarded 100% probability. But if he will not, then any known associations he has with other individuals can be used to calculate a probable “degree of membership”.
We have no idea what rules are applied, or the weight given to them. The could take into consideration, for example, factors like skin color, race, language spoken, location of birth, marital status, family pedigree etc. I'm certain that the police are already taking some of these factors into consideration in deciding who to pay special attention to. The difference is that this technology is impersonal and can be misused to provide a veneer of legitimacy to otherwise abusive acts , e.g. "I'm shaking him down because the program says he is a gang member".
My point is that people who are born into a gang dominated environment already are severely disadvantaged, and it sits ill that someone who may be innocent may be subjected to undeserved police action/scrutiny simply because he is marked as a criminal by some program.