How, you ask?
Pretty simple... He sent the night duty officer out for coffee and sinkers.
A captain in the Med ford, MA PD led a notorious raid on a Malden Savings Bank, leisurely looting the safe deposit boxes over Memorial Day weekend. The cop gang also sold cocaine and stole the tests for rankings in the old MDC. They ended up shooting it out with each other over drug profits. The leader wrote a book, "The Cops Are Crooks".
A bunch of Haverhill and Lawrence, MA cops ran a cocaine ring out of a health club in Bradford. One of them, the son of the Haverhill police chief was killed and the murder is, I believe, still unsolved.
Career police officers have the same psychological profile as career criminals.
Good thing I retired at 20 eh?