Do you mean this quote?
Link:
http://www.lohud.com/article/201107...n-Spierer-s-mother-posts-new-emotional-letter
My interpretation: Does not quite accuse the person or group of killing LS or causing her death, but rather states that LS's life or quality of life is not their priority. The accusation is only that they put own material gain or advantage first.
Of course, a truly heartless and completely selfish person would be completely unmoved by such a accusation; therefore, maybe the author suspects that this person or group actually does care about morality or at least wishes to be appear as having good morals.
The person or group is not proactively committing a crime, nor have they necessarily committed any crime at any point; but rather they morally err in their failure to act. They are
not saying something that should be said, or
not doing something that should be done.
The person or group is a passive
bystander who observes the situation and fails to act, rather than an aggressive criminal.
The person or group should consider their religious or moral principles.
Directed towards esp. younger people, who will have decades to live with the guilt if they do not do the right thing now.
Means that these silent watchers have taken her family's faith in humanity and the future, and not that they actually abducted LS.
JMO: this message is intended to persuade friends and acquaintances of LS to come forward with any info they may have.
Therefore, the message seems to imply that this case was not a stranger abduction; since anyone reporting LS being seen with a stranger would not be harming their own self-interest.
Nor does it imply that a young person might not being coming forward due to loyalty to a friend or boyfriend. They put their
self-interest first.
Whoever is not telling the family or the proper authorities where LS is or what happened that morning is
gaining in some material way from not doing so.
The message does not seem to consider the possibility of any actual antipathy on the part of the watchers.