What treatment would be necessary in this case of getting shot?

I am writing a weird sort of social commentary - bizarre story about Santa Claus (who is a casino owning vietnam veteran gang leader) getting framed for the murder of the Easter Bunny (a drug trafficker). I told you it was weird, but either way, in the story a detective trying to clear a Santa's name goes to interrogate someone who gets his head hit by a sniper rifle with a suppressor. Later on he gets shot by the the sniper from the eighth floor. The bullet scs his leg and he makes a tourniquet out of a belt. He then goes up the elevator to confront the sniper armed with a shotgun. He once again gets shot in a different leg and the shoulder. I want to know what type of treatment he would have to be given and how long before he was back on his feet.