What type of tax document was issued to them?  

not only what document but what state - most nyc lodi is already reflected in box 1 wages and a code in box 14 has the lodi amount

there are county/village police in NY that don't do it on the w-2 for you and you need them to get you the number of days out as well as the day rate of pay - calculate it and keep a copy of whatever they supply showing the days and back it out of other income with a line of duty non taxable description

In CA Ive never seen a tax documents when its nontaxable for injured on the job. 

Disability pension will have a reduced amount in Box 2 but thats the closest Ive seen.

You see a lot of things in New York that you won't see anywhere else.  Even in California.  You will see Lodi, but that's a town between Stockton and Sacramento, known for a song by a guy who was stuck there. 

I think the idea here is that it is the equivalent of worker compensation, but they just continue the paychecks and do a book entry to explain the difference.   

We figured we put it as a negative amount on schedule 1 and send the letter pdf with the 1040