Hitmen Robert Knapp and David Croke stabbed and shot Mr Raja
on his doorstep in Sutton, Surrey, in 1999.
The prosecution witness, Caridad Rodenas, went around the gallery for almost 15 minutes but failed to identify Rajas.
The defense panel had earlier told the court the real Rajas was in the room.
Yesterday their father Amjad Raja confirmed to the Sunday Mirror that his sons had decided to sue the jailed tycoon.
Asked if Hoogstraten had expressed any remorse, Mr Raja replied: "None whatsoever.