Looking over the case I believe that my understanding of the word attenuation was not how the word was being used in this case, that it was actually being used to attenuate the illegality of the arrest not the guilt of the victim.
The warrant attenuated the illegality of the detainment and not the arrest. And the warrant alone was not sufficient to make the products of the search admissible.
Here's how it went from my understanding:
1. Officer stops person to question him and run ID check -- this constituted a detainment as the person was not free to go and also not under arrest. Per the courts, the detainment lacked reasonable suspicion, however the officer at the time believed there was indeed reasonable suspicion (e.g. acting in good faith, at the worst negligent, and not flagrant per supreme court).
2. Arrest warrant found when running ID -- this
attenuated the illegality of the detainment.
3. Person was arrested and his person was searched in process of arrest (routine and legal as to ensure weapons and contraband are not to compromise the jail)
4. Illicit drugs were found on the person's possession.
The supreme court heard the case to determine if the products of the person's search were admissible given that the initial detainment was deemed illegal.
The majority opinion was that they are admissible because of 3 things which must all be met:
1. The initial detainment was not flagrant
2. The warrant attenuated the illegality of the detainment
3. The value to society of prosecuting the person for drug possession outweighs the value to society of suppressing the products of the search in order to deter law enforcement from future illegal detainments
I am not sure, but I think it is correct as argued here, that regardless of the illegality of the detainment or even the flagrancy of its illegality, the arrest would still be valid since the warrant existed, however if the detainment was flagrantly illegal, then the products of the search would not be admissible regardless of their value.
I share your concern that the supreme court is increasingly being used for politics instead of objectively attempting to apply the letter and spirit of the law. This is especially important if either party obtains control of the white house and senate, as that will allow establishment of a serious long-lasting political tool that should not exist.
That said, I do not believe that split decisions are inherently indicative of a political instead of judicial court. It is near impossible to write legislation that cohesively and objectively captures its intent for all cases which endures in applicability over centuries. The purpose of the supreme court is to provide guidance in such cases (and, hopefully rarely, to correct the clear wrongdoings of lesser courts). By definition, these cases involve logical ambiguity and that is OK to me.
What is concerning to me is the societal constructs from which these decisions flow or are interpreted. We are going to determine the effects of this decision, not the decision itself.