Maybe it was all his fault. There is certainly no further info stating that it wasn't.
However, I would rather wait until I get better info before assuming it was all his fault. What if YOU were sent to deliver a timely package and given the wrong address ? Later, after getting a call from the angry client your boss calls you in and says, YOU WENT TO THE WRONG ADDRESS. Can we then assume it is ALL YOUR FAULT ?
You are not going to get that info unless the miniscule chance of a followup article is published after the investigation.
I still think you are missing the point of the discussion here. We are indeed talking about the incident from those various possibilities. You are never going to get the final facts on this.
i.e.
If the mistake was his, then...
If the mistake was the dispatcher's, then...
I will say this, if the cop couldn't get a clear communication from the dispatcher, he should not have entered the property until he was certain of the address he was being given. This is not like delivering a newspaper to the wrong house.