finger as

finger (one) as (someone)

To identify someone as having had a particular role in something. If they have security cameras, they'll definitely be able to finger us as the thieves!See also: finger

finger someone as someone

Sl. to identify someone as a certain person. (As if one were pointing a finger at someone.) Max fingered his partner as the gunman. The accountant fingered the bookkeeper as the one who fixed the books.See also: finger