>>3906876 (pb)

https://en.wikipedia.org/wiki/List_of_U.S._state_abbreviations

Panic INdiana DC

>>3908609

He's holding his index finger.

As for sign language possibilities:

Shoot - fire pistol

https://www.signingsavvy.com/sign/SHOOT/4493/1

Assassin

Index finger going into other hand.

https://www.signingsavvy.com/sign/ASSASSIN/924/1