What's the deal with this one dollar bill?

Got this in change today. What is up with it? Did something get spilled or maybe it's an error?

 

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Looks like someone was bored. Or used it as a straight edge like a ruler.

 

That bill has been damaged. It’s not an error of any type.
Welcome to CT.

 

Thank you! Was a bit confused when I saw it.

 

You’re welcome

 

Looks like someone went wild with a marker. The ink color doesn't match that of the banknote either.

 

Sometime the black ends are used as a count marker in ATM machines. But I don't think that is what this note is. The red underneath the black is unusual. Looks like someone with time to kill and a magic marker to me as well.

 

Maybe its come out of a dye pack after a robbery.

A "dye pack" is a radio-controlled security device used by banks to foil robberies by permanently staining stolen cash and the suspect with a bright, indelible dye