I presume the video is from Thailand. I’m basing the assumption on the watermark in the bottom left corner of the footage which looks Thai to me.
The CCTV video shows a well dressed young man walk into what looks like a place of business, where he pulls out a firearm and shoots one of the girls working the shirt.
According to the backinfo I got, the man was an ex husband once married to the woman he shot. She must have monkey branched to someone of higher perceived value.
Props to Best Gore member @nikish for the video: