Technology is helping us not only in crime investigations but in every field in our life. I think we pay with our privacy but we should decide if the negative aspects are more than the positive ones when using technology in our life. In my opinion we have already choosen. Sharing a lot of our private life in social networks, with our identity being in risk only because we use different forms of technology everyday means that we already have decided to pay this risk to have better lives and that means better security.
(Please see the video I have attached so you would create a better idea of what I am saying)