That cop is going to jail for shooting that 22 year old.
You put yourself in the situation of the victim and you get his reaction. Put yourself in the situation of the officer and you get his reaction. I have the utmost respect for police and understand the situations they are put in are very difficult. But I do not think this will end well for the officer, right or wrong.
No knock warrants are a lazy way out for the cops.
Do some real police work and build a legal case.