Potential burglars have been using bump keys for years, as the pins of the core and housing jump to the shear line for a fraction of a second, allowing the lock’s locking pawl to turn. This results in minimal signs of forced entry, making it difficult to prove a break-in.

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Many burglary victims later face issues with their insurance claims. However, modern forensic techniques now allow police to detect when a lock has been opened using a bump key.