[Theoria]

'The chain was used in March to prop open an emergency exit door at a subway station as part of an Occupy Wall Street action to allow passengers to ride free. '

The chain was used in a crime. You can see the perps using it here.

I suspect NYC is creating a master database for 'every' crime committed in the city, no matter the degree of charge. Databases of databases is the future.

[REDWOOD99]

So your DNA can show up in a NYPD database even though you haven’t been convicted of, arrested for, or even suspected of a crime because someone who committed an alleged crime touched something you did?