"Don't you think it might be better to have some corroborative evidence?"

But corroborative evidence of who fired first has yet to be provided.

It can provide corroborative evidence as to the identity of a compound.

There is no corroborative evidence to support any of these cases.

"I take it that they lack corroborative evidence," he said.

"The police think they have the corroborative evidence they needed," Robert said.

If the man should make that case this would certainly be corroborative evidence.

What is the other possible corroborative or supporting evidence here?

There is no corroborative evidence to support this theory.

However, there is no corroborative evidence to support this case.