the finger of (suspesion|blame)

the strong belief of someone being responsible for or guilty of something

The idiom "the finger of suspicion" implies the act of pointing or attributing suspicion or blame to a specific person or group for a particular event or circumstance. It is used to suggest singling out someone as the possible culprit or holding them responsible for an action. The idiom's origin is not precisely documented, but it reflects the human tendency to seek answers and accountability when something goes wrong.

According to recent polls, the finger of blame is pointing squarely at the president for the recent economic downturn.
He was shocked to realize that the finger of suspicion was now pointed at him.
We must be careful not to place the finger of suspicion on anyone at this stage, as we don't have any facts or evidence yet.
In the absence of evidence, it's not fair to point the finger of suspicion at any one employee for the data breach.
The authorities were quick to place the finger of blame on the rival gang, but they needed more information to confirm their involvement.