Continuity mistake: At the beginning of the movie, when Warren is waiting for his last working day to be over, the ticking clock is shown in close-up, and it casts a strange shadow, as if it were lit right from below. In all wide shots there is no shadow at all. (00:01:20)
Continuity mistake: When Warren eats the sandwich made by Jeannie he is taking the glass of milk in his hand. When the camera angle changes he is seen rubbing his thumbs against his index fingers. (00:35:45)
Continuity mistake: When Warren comes to his old office to see his successor, the way his coat is folded over his arm changes between shots when he walks in. (00:13:25)
Continuity mistake: When Warren gives his speech as the father of the bride and just says "...a companion, a partner..." he is taking the microphone in both hands. When the camera angle changes his left arm is hanging down as before. (01:45:10)
Continuity mistake: When Warren walks to the motorhome for the surprise breakfast, the air is almost still. As soon as he steps inside, the bushes outside the window are now seen rocking rapidly in the wind.
Answer: He could have picked it up. Besides, it may not have been stolen, but picked up by security, or otherwise taken to Lost and Found.