There's no such thing as "objective evidence".
Objective evidence does exist, and is evidence that remains true irrespective of perspective.
The interpretation of that evidence might be subjective, but the evidence itself can be objective.
Evidence by its very nature is a fact or measurement interpreted to prove a specific theory or hypothesis.
Yes, and here you need to distinguish between the measurement (the evidence) and the interpretation of that evidence.
For example, a murder victim may have DNA evidence of her husband on her body. But that doesn't mean he killed her.
Indeed. The objective evidence here is that the victim had a certain person's DNA on her body. Does anyone dispute that evidence? Does the evidence hold true irrespective of the perspective? Yes.
The interpretation (that the husband therefore killed the victim) is subjective, but the interpretation is not the evidence.
He's her husband afterall. Evidence is not objective. It is a spinning of data to support a preconclusion. It only makes sense in a given explanatory context. It doesn't exist in itself.
You need to distinguish between the evidence and the interpretation thereof. Objective evidence is the fact.
Your example might also just be highlighting the difference in usage of the term in science compared to a court of law. In science the evidence is simply the measurement, the data, the fact. The hypothesis is the explanation that uses and fits with the evidence. If it doesn't fit with the evidence then the hypothesis is flawed and will be discarded.
In law, evidence is that which is used to support a case, so is often cherry-picked to support a particular story that the defence or claimant is working to, but there is no need for the conclusions to be sound and valid, it merely need be "beyond reasonable doubt" in the eyes of the jury etc. but the jury have no requirement to use anything but their own gut feel, prejudice, ignorance, emotion.
But in both cases the evidence can be objective, and it is the subsequent interpretation of that evidence that is subjective.