Reformation DLC, Far Harbor Quest
To get this quest, you have to agree to keep DiMA's secret and give him the evidence.
This quest will be triggered or can be aquired when you complete The Way Life Should Be quest.
Related points of interest
Stages of "Reformation" quest
1. Recover Martin's Holotapes
I've agreed to help DiMA replace the High Confessor. First, I'll need to recover a couple of Confessor Martin's holotapes from his old refuge.