Jennifer had recently changed teams. She used to be a developer for OnStar by day and a hacker extraordinaire by night. Now she's dead by day and one of the living dead by night.
Jennifer was welcomed into the community and the rules were explained. Rule number #1 is that humanity must never know that vampires exist. In an age of autopsies and forensic technologies human beings are pretty much off the menu.
Jennifer asked, "But can't we feed on those who are already badly injured without anyone knowing?"
"Perhaps," the answer came, "but how could we find such people?"