give the benefit of the doubt

[give the benefit of the doubt] {v. phr.} To believe (a person) isinnocent rather than guilty when you are not sure.

The money wasstolen and John was the only boy who had known where it was, but theteacher gave him the benefit of the doubt.

George's grade washigher than usual and he might have cheated, but his teacher gave himthe benefit of the doubt.