'would incriminate' is a perfectly correct and usable phrase in written English.
You can use it to refer to something that could potentially be used as evidence of wrongdoing. For example: "The emails she had sent would incriminate her in the scandal."
It was expected that testimony would incriminate important members of the political class.
Fearing arrest, and knowing that even the books in her house would incriminate her, she turned to her old friend.
"In that conversation the only thing it shows is the authorities thought that would incriminate Ray when in fact it does not do so.
Harding said Brett's explanation for his silence was that the knowledge was confidential, legally privileged, and would incriminate Foster if it were revealed.
In Cadder, a case decided in 2010, the court found that the Scottish system was expressly designed in the hope that an individual would incriminate himself during questioning.
Told by the judge that he did not have to answer questions if he believed doing so would incriminate himself, Harwood replied: "I was very aware of that.
Francis said he and another undercover police officer trawled through hours of footage from a May 1993 demonstration, searching for evidence that would incriminate Brooks.
Going further than previously, she referred openly to recent attempts by the CIA to remove documents from the network detailing evidence of torture that would incriminate intelligence officers.
She later speculated that her interrogators were eager to compile evidence that would incriminate Zhou Enlai, the prime minister, who opposed the Cultural Revolution.
And in case viewers are not clear on the significance, the Fraud Files ad quotes a state prosecutor Michael McCauliffe saying "a truthful answer to questions he was asked would incriminate him".
