Lincoln Campbell was a virtual recreation of the real-world person of the same name inside the Framework.
Captured by HYDRA
Tortured to Death
Since Campbell was an Inhuman, HYDRA hunted him down and eventually caught him. He died as The Doctor was experimenting on him.
Aida used the prospect of resurrecting Campbell within the Framework to try and convince Daisy Johnson into surrendering, however she still refused to give in.