Photography as a form of evidence

I looked at an aspect of photography as evidence at the Victoria and Albert exhibition 'Exposed'. The "exhibition examines photography as an invasive act that, whether by intention or effect, challenges common ideas of privacy and propriety. Most of the pictures were made without the subjects knowledge." (V&A Museum, 2010) It was intriguing to see how many different ways photography could be used as evidence. For record of death, criminal acts, intimate/private events etc. The possibilities and uses are so diverse. Surveillance is another form of evidence, which was also contained in the exhibition and in the lecture. Surveillance is seen as a form of safety. So, in many ways photography or film is connected to each and every one of us, everyday, sometimes without even knowing that we our involved.
While researching sources for the media histories and culture essay assignment to include on the iMap, i came across this book, which although wasn't related to my chosen genre of photography, gave me a good insight into this form of it. 

Secure the shadow: death and photography in America. By Jay Ruby.

"A camera is like an eye". A lot of events or interesting things we see we want to show to other people, or prove to other people that we have seen them.This is why a lot of us carry cameras around with us a majority of the time, and even have cameras installed into our mobile phones. As far as I can see, photography will always be used, especially as a form of evidence.  

Here are a few examples that I found on photography as evidence: