Separated by a Common Language

I've had a couple of requests (from Dennis in May and Marc in June) for coverage of the BrE phrase fingertip search, and more specifically for the AmE equivalent of the term. It's a term that comes up a lot in the news and in one of the UK's great cultural exports, the murder mystery novel, and thus there are some other available discussions of it on the Internet, for example on Language Log and in this discussion forum for translators.

Let's start with the meaning. Fingertip search (or, more rarely, finger-tip search) is a search carried out by people (rather than technology, like a scanning device) for something that probably needs careful attention in order to be noticed. It is most often used to describe, the goings-on at a crime scene, especially a place where a corpse has been found. This leads to the question, is it a search for fingertips, or a search with the fingertips? The common assumption (in our household, at least!) is that it's the latter. This photo from a 2002 BBC story illustrates the point. It's captioned: 'A fingertip search took place in atrocious weather conditions'.

While/Whilst one mostly finds fingertip search in discussions of crime scene investigations, it's not exclusively used in such contexts. For instance, the Language Log post linked above has an example of a fingertip search for newts and other amphibians, as part of a conservation effort. It does, however, connote an official search. For example, you don't typically hear people saying that they conducted a fingertip search of the bedroom carpet for a lost contact lens, and if you do, it's probably meant to be a little humorous.

Finger(-)tip search is not to be found in the OED at this point, but we shouldn't conclude too quickly that it's a new term. It's rarely explained in the BrE news contexts in which it is printed, which seems to indicate that the writers feel that they can assume BrE speakers' familiarity with the term. Using Google Book Search, I've found an example in Blackwell's Magazine from 1945.

I remember an age-long fingertip search of a vast sweep of recreation- ground ;
I remember finding a mine balanced weirdly and precariously on its nose

That's as much as I'm allowed to see via Google, but note that even back then, the term is used without explanation--so it must have been a somewhat familiar term by then. It also may not be a crime scene, but the scene of a bombing. (We could consider that a crime scene, I guess.)

As for the question of what the AmE equivalent is, I don't think there is a noun phrase that sums up this meaning in the same way. And there doesn't need to be, since the activity is very describable (e.g. the police searched the scene with a fine-tooth[ed] comb) without a specific noun phrase equivalent. While it's convenient, if you need to talk about something a lot, to have a specific lexicali{s/z}ed expression for a particular concept, there are always other possible ways to describe it too.