fingertip search       
noun [ C ] UK uk/ˈfɪŋ.ɡə.tɪp ˌsɜːtʃ/ us/ˈfɪŋ.ɡɚ.tɪp ˌsɜ˞ːtʃ/
 地毯式搜查
a very careful search of a place, usually by police officers or experts, to try to find evidence relating to a crime
  The crime scene was immediately sealed off and officers began a fingertip search of the area. 犯罪现场立即被封锁,警察开始对该地区进行地毯式搜查。 
 to carry out/conduct/make a fingertip search 进行地毯式搜查 
 - More examples
 - Forensic experts made a fingertip search of acres of woodland.
 - Police in Blackburn carried out fingertip searches of two houses and a college that the man had attended.
 - Three men were arrested at the address and officers conducted a fingertip search of the premises.
 - A body was found in a shallow grave at Norwood Edge, near Harrogate, sparking off a fingertip search of the area.
 - Police sealed off much of the common in a fingertip search for the knife.