It's possible! Contact the feds to see if the serial number matches any from old bank robberies. Chris
I would hope that the bank would not have that much detailed information about individual small bills. Feds could probably state if they had not recovered all the money ($1.00 less). I would also think that there is a way to test this ink.
It could be, looks like some of the ones I have seen. Though it is possible someone just spilled Kool-Aid on it
It's some aggressive dye on the bill. I've done my share of spilling cherry kool-Aid and my mom would have really kicked my butt if it stained like this.