Of course, it would be hard to prove An Sheng's involvement in the coup.

The problem was how to prove his involvement.

Despite an investigation of Huber by the Swiss government, no evidence was ever produced which proved his involvement with the organization.

It is doubtful that we can prove your involvement.

We still have one more chance to prove Trent's involvement in the deaths and the existence of the toxin.

He added that the interview revealed nothing that could prove his involvement in any crime.

Even if I could prove your involvement, the family would simply disown you, claim they weren't involved, which they possibly weren't.

However, no investigator or historian has been able to prove Sommerfeld's involvement.

But he admits it is almost impossible to prove their involvement.

These works then were used to prove their criminal involvement.