You kidnapped and shot down a CP in-front of the accused RDMer. That is justification enough for him to kill you on the spot, however, the video shows that the cop did in-fact attempt to taser you, but missed. He is justified to pull out his gun rather than die as you deployed lethal force.
When dealing with a staff member, it is crucial to be respectful in the sit when possible. We understand you can get heated, but staff are less likely to assist you to their full capacity. You also insulted him multiple times throughout and minged in the sit.
This is also a notice that you need to be more respectful when posting forum content. Please keep foul language to a minimum