This is exactly what you don't see in here, just the mere fact that you are suspected (or alternatively, about to be suspected as you're performing a crime) does not grant you the ability to shoot every cop you see on sight, assuming he is there to arrest you or even worse, take you down. Also, you were not interrupted at all - You decided to relate Elias to your scene for a reason that I can't understand.
Elias here, like with many other people in general and cops in particular in various daily situations got caught in the wrong place in the wrong time but you as a player was not correct here either. Yes, it was an unfortunate mistake but the responsibility falls on you and not on Elias for passing by. People miss some chat messages when they are not focused, it's nothing new. But you as a criminal that is currently committing a crime should not engage a cop let alone start a shootout with a bunch of them. You should run away, considering that very specific police officer that has reached your position (regardless if he interacts with you or not) is still a police officer and you are not some immortal that can not die - You should not go rampage and kill someone just because he's wearing a uniform, not everyone is there to arrest you.
Matthew had no intention of humiliating, hurting the feelings of, shaming or pointing fingers at anybody in this community in particular. What he did was posting a video, chatlogs and conversation logs that are relevant to the situation. You want the full conversation logs and videos? I can give you them very easily, the only issue that you will face is that there is too much irrelevant information (irrelevant = not related to the topic of discussion) that is just going to confuse you or steer you away from the subject.
The reason this topic was submitted is very simple; To address a very specific and very common mindset that many people seem to have around, they like shooting cops and some of them commit crimes just so they can shoot cops, for the fun in it. You want to tell me that it's not a wrong mindset to have? You want to argue with someone here that it is somehow acceptable to shoot every cop you see just because you assume he is going to arrest you, considering he even knows who you are and what you are doing?
The only horrible example here is the player's, and Jamal is just the person that ended up being in the spotlight. If it wasn't him then it'd just be another person, it's a recurring issue and the list only grows.