Point Blank

In the first chapter of Point Blank another book written by Anthony Horowitz a man is murdered. The man who is killed is a very wealth man who owns a computer company.He is killed by "the Gentleman" a hit man hired by some unknown source. He made it look like an accident by moving his private elevator up one floor and putting in a hologram so it looked like it was still there. After Michael Roscoe the computer guy stepped into the hologram and fell fifty floors to his death the gentleman simply replaced the elevator to its original possession and left. The hit man is called the Gentleman because he sends floors to the wives and families of all the people he kills.