Pettigrew:

Whether or not we have multiple Cops, they should still not be revealed, I believe. They are far more helpful to the town if they remain hidden. Drawing them out and making them roleclaim merely puts them higher up on the Mafia's list.

Myrtle:

That is always possible, true enough. But again, so many roleclaims... It makes it difficult to trust you. While having a stronger role might seem like a good thing to you, it will likely give the Mafia more reason to go after you...