I believe the wireless pinhole camera has proved to be quite indispensable of late, in many areas of operations, owing to its easy portability and size.  The mini versions of these cameras are handy as they can be hiddenaway from the offender’s view.  A nanny who was regularly misbehaving and ill-treating a child she was supposed to take care of was caught red-handed and handed over to the police.  It was not just ill-treating the child; she was also used to making away with small pieces of value from her employer’s house.  Offenders cannot go scot free now with the introduction of surveillance cameras in so many places.