Local company had stuff go missing. Biometric entry/access system showed it was always the same cleaners in the building when things went missing. Cleaners fired, although no other evidence found. Stuff kept going missing, with a different set of cleaners being fingered. They got fired too.
After a couple more rounds, turns out it was the security guard in charge of taking said prints who was making copies of the fingerprints and using them. He was discovered through old fashioned methods of physical surveillance.
Which only goes to show that the technology doesn't solve the problem, it simply adds another layer of security theatre that allows people to waltz through and do what they want while using said technology to point the finger at someone else because machines are, fundamentally, very easy to fool.
ps: the cleaners were never re-hired, or apologized to. The security guard was never charged, because doing so would have embarrassed the people involved. The incident was not reported to the press for similar reasons. No, I'm not saying which company this was at. The company is now bankrupt, and the people involved scattered to the four winds.