Все три примера демонстрируют, что этот термин обозначает именно "заметание следов":

Some years ago, saw one of those real-crime tales about
forensics. A policeman, who was obviously aware of how crimes were
investigated, had murdered his wife and attempted to make it look like a
burglary gone wrong. I think he only missed a couple of tiny details,
but they conclusively proved that *somebody* had staged the scene, and
from there his story unravelled.

I think the smart interpretation of *"forensically aware"* is making sure
there is *no* trace evidence, which is both possible and achievable, as
opposed to making it appear something it's not, which is possible but
extremely difficult to achieve.
http://business.zliypes.com.ua/post/2679.html

Terrorist infrastructures were ideally suited to organised crime, where you had intelligence gatherers, financiers and operational people to carry out the crime. People trust each other, they work on the need to know principle, that not everybody in the organisation needs to know everything that is going on. *They are aware, forensically aware, of what police can do, so they try to remove all traces where they have been at particular crime scenes*.
http://news.bbc.co.uk/nol/shared/bsp/hi/pdfs/15_03_05_real_i...

It is amazing that, knowing how *forensically aware* the terrorists are and how clever and thorough they are at covering their tracks...
http://www.theyworkforyou.com/search/?pid=13613&s=section:lo...

Another problem caused by media coverage of forensic science is that it informs criminals of the techniques the police employ to catch them. "People are forensically aware," says Guy Rutty, of the Forensic Pathology Unit at the University of Leicester, UK. For this reason, some forensics experts are reluctant to cooperate with the media.

http://www.newscientist.com/article.ns?id=mg18725163.800

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Note added at 3 hrs (2006-06-06 18:18:32 GMT)
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Скорее даже "действовать, не оставляя улик"

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Note added at 9 days (2006-06-15 15:11:34 GMT) Post-grading
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Александр, спасибо!