Tried to find Phillip Haney's book "See Something Say Nothing"(hardback with copy of letters) but no luck, however found a long interview from Nov 2016 when he was out talking about the book. This is long (2 hours with question time) but full of incredible details and information. A true expert and a great loss. Worth a listen IMHO. RIP Mr Haney, a true hero.
Couldn't embed - here is the link:
https://www.youtube.com/watch?v=t8ClIkAAAm0&feature=youtu.be&t=3172