Cameras are everywhere. Sometimes we are aware of them, known as overt surveillance, and sometimes we are not, known as covert surveillance. Technology for surveillance has come a long way from the operator in a car taking photos with a still camera. The proliferation of digital imaging and internet wireless technology allow us to see and record more than ever imagined. In this lecture, surveillance techniques are discussed and demonstrated, with real world cases and practical applications of surveillance in criminal investigation. I saw what you did, and others won’t believe it until they see it also.