Digital Photography

One of the largest jumps forward for hunters in the twentieth century was the invention of digital image capturing. Prior to this, vampires could never be positively identified by image. They appeared as dusty shadows or remained totally invisible on film, depending on the age of the vampire in question, and descriptions of them were notoriously impossible to capture via sketch artist.   But when silver-based film was replaced by digital mediums, hunters discovered that not only could the actual image of a vampire be captured, but it could be used to make positive identifications. Overnight, the surveillance techniques of hunter agencies changed dramatically, and rather than completely relying on in-person patrols, agencies began to develop robust digital tracking capabilities at their home locations.
However, digital photography and video is a double-edged sword. With the ability for hunters to capture video, came the potential for civilians to also document the true existence of vampires. And for the first time, the hunters were faced with the issue that had plagued fae-concealment initiatives for decades. Incontrovertible visual evidence of something out of the ordinary.
Now, "Scrubbers", hunters who remove evidence from the web, are a vital part of agency digital surveillance teams. Scanning the internet for any valid posts of vampire sightings, they pass along the information to the field teams before removing it permanently, or altering or discrediting it.
In the decades following the discovery of vampire visibility on digital mediums, vampires have adapted to this new vulnerability. While they are no longer able to roam in front of surveillance with impunity, their speed allows them to appear as nothing more than dark blurs if they truly want to avoid positive identification. 
While digital surveillance is responsible for about ten percent of vampire arrests, this is nowhere near the seventy percent peaks of the early years of digital technology, and now most surveillance scanning departments have more or less converted totally to a 'scrubber' role, relying less on traditional surveillance and more on the proliferation of social media to track the movements of vampires.

Access & Availability

Since digital photography is available to anyone with a smartphone or a variety of other devices, its widespread use has changed the landscape of vampire hunting irrevocably.