Complex sentence: Posner easily convinces Stottlemeyer he had been in bed all night and had never once set foot at the restaurant in his entire life, and also reveals that his gun-a 22 caliber-had not recently been fired.
Split into simpler sentences: Posner easily convinces Stottlemeyer he was in bed all night and had never set foot at the restaurant in his life. Posner also reveals that his gun-a 22 caliber-had not recently been fired.