It could be a Learjet, but I can't find a match.
The tail is quite unique. I thought about Embraer Phenom, Hondajet, and Cessna Citation, but it is none of these.
I believe that your images are showing a British Aerospace 125 (aka Hawker 800/1000, or DH125 Jet Dragon). They were produced from 1977 to 2013, and most of them have been in service for the air forces of Japan, Brazil, and Saudi Arabia.