That's a perfect example of what I'm talking about.
Defense attorneys are expected to find reasonable doubt, where it exists, when evaluating evidence.
These types of 'what if' arguements would only apply if a charge of filing a false police report are filed against the AV.
It is not the responsibility of the defendant to prove a negative.
You're right. A DA's job is unique. His search is for the Truth and Justice in the name of the People he represents. His role is too adhere to certain standards to get to that Truth.