You are demonstrating a fundamental misunderstanding of trust. Aaron Katersky and Josh Margolin put their name on the line because without that you wouldn't know the provenance of the information and wouldn't know if you should trust it. Citing an unnamed officer making claims that they have insufficient evidence for is not good journalism, so their reputation takes a hit. The officer also deserves this reputational hit since they are making the unsubstantiated claim.

To be very clear here, the claim is that "there is nothing to suggest the two sets of predmeditated murders within a week within an hour are related". The fact that they're the same demographic, high profile, using the same weapon, close in proximity, and close in time are all concrete things that relate them. It is embarrassing to state otherwise, so the officer was not named. However the reporters are not immune to this, so they take the hit.

I am not stating the positive "they are related", I am refuting the negative "they are unrelated".

And as for my identity: I am not a reporter or public official. You don't need to and shouldn't use me as a source of truth. I am a member of the public applying logic to facts. I am closer to this event than you but I won't say more. As a member of HN who respects privacy I'm sure that should be enough for you.