Factual error: In the ending credits, in the cast section, the word "Mobile" is misspelled as "Mobil" five times.
Factual error: At one point, Detective Keith Frazier gives orders to an Emergency Services Captain, who obeys them. In the real NYPD, a captain outranks a detective and would never take orders from his subordinate.
Answer: The aforementioned answer fails to keep in mind he is the owner of the bank and could've have done this hours before the bank was opened and or hours after the bank was opened. Dalton spent 3 days behind the wall. Mr Case had a special fixer, and she had the mayor in her pocket. It is a reasonable assumption that a billionaire like Aruthur Case would be able to have the contents of his safety deposit box removed with little to no problem. One way is "yes Mr. Mayor I will be giving you a blank check for your reelection campaign." The issue is this was a major plot hole that almost ruined a otherwise great and well thought out movie.