You're role
Why don't you tell the truth about your role since I'm not entirely certain your role is a bad one
This doesn't make any sense to me. Dess probably summed it up pretty well, but:
Suppose that Ltin holds a non-bad role.
Recall the Ltin claimed that Ltin is a Gunner.
Recall also that Ltin fired a gun.
Then either
1. Ltin is telling the truth about his role.
2. Ltin is lying about his role.
If Ltin is telling the truth about his role, then he is a Gunner, and thus a non-bad role.
If Ltin is lying about his role, then he has a role with the abilities of a gunner, but is not a gunner. Thus he is likely non town.
Then Ltin is a bad role, contradicting the previous assumption that Ltin is a non-bad role.
Therefore Boooo's statement doesn't make any sense QED thanks for coming to my TED talk