Almost every person installs security cameras hoping that one day they will "catch the criminal" unaware that the footage probably is used in all possible ways all the time, yet in case when the crime against them finally happens the footage might not be admitted as a proof.

> yet in case when the crime against them finally happens the footage might not be admitted as a proof.

Or there is simply not enough staff available to carry out the procedures needed to apprehend and charge the individual. Or a myriad of other things. People think law enforcement is easy.