Other mistake: In one of the beginning scenes, the time at the bottom says that it is 22:00, which means it would be 10pm in China. In the scene, it is bright daylight, not night time as it should be. (00:02:15)
Other mistake: In the deli's basement, Wheelie shows places on a map of America where Seekers are hiding. Agent Simmons states that the closest is in Washington D.C., but the closest marked on the map is in the middle of New Jersey, near Philadelphia.
Answer: After the tomb, he doesn't appear onscreen again. There's no indication as to what happened to him.
JAGwire