Albert was stressed, sleep deprived, and his mind was clouded with confusion.
How did that medallion get into Aiden's hands? Are Sarah and Aiden behind robberies on his homes? That means they have in their possession much more than just valuables and that damned medallion. There are other documents, evidence. They are behind all the mess that is happening to him in the last few days!
That's it! When Albert exposes them, all these people at the table will spare no resources to attack Sarah and Aiden and get rid of them once for all! Proving that they robbed Albert will also be indirect evidence that Sarah and Aiden are behind looting Rance's residences as well.
Albert bit the inside of his cheek harshly, using the sharp pain to bring himself to reality.