AGAA4
I am the widow of a police officer and know that perpetrators often claim to be victims as the murderer did in this case. The police assumed from the information given to them that Henry Nowak was the attacker and falsely assumed that he was playing the victim card.
I'm not defending what the male officer said but I can see the thought processes. The murderer was a plausible liar and knew he had stabbed Mr Nowak but continued lying as he lay dying. He is totally to blame for the death.
Of course, in fact I've posted a video of an ex chief of the met who has pointed out precisely that, but he also said that a very important part of the role is to reassess the situation, all through the situation, every ten seconds or so, reassess, reassess, reassess .