
Revealing mistake: During the gemstone smuggler robbery, when Verbal kicks open the van's rear doors, McManus begins to use a sledgehammer on the NY police cruiser's windshield, and behind him we see two very tall palm trees―in NYC. This scene was filmed in Los Angeles. Note the police cruiser has number 2485 at the airport and turning corners with the van tailing (filmed in NYC). As the van hits from behind it's 6423, and the stunt vehicle set on fire is 6426 (filmed in LA).






Answer: Soze ended up back under arrest and for some questioning as 'Verbal Kint'. He never really vanished, he's just playing two parts/people. He really vanishes off the scene by the end of the movie after he tricks Kujan.
With the exception of what's known to have happened on the dock, the entire story is a lie told by Verbal Kint to Agent Kujon. Kujon realises this after Kint leaves the office but not in time to catch up. The entire movie is about a habitual liar making up a story about what happened on the dock. He may be Keyser Soze or an alter-ego variant but even Keysers rep is subject to question as it was told by the same liar. Verbal himself said about Keaton, "He was a grounded guy, a cop. If you think the husband did it then you're right." He was telling on himself as sociopaths will do when they think they're smarter than everyone around them.