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!
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.
finger someone as someone
tv. to identify someone as a certain person. (As if one were pointing a finger at someone.) Last Card Louie fingered his partner as the gunman.