I'd report it. The cops won't mind and if it does turn out to be useful it could help a future case. If not no harm done at all. Perhaps I watch to many cop shows, read to many crime books but Johnny Public is the best resource that the cops have, if we ignore stuff and don't report it they have...
This might sound a bit daft but did you report it to the Police? You might think it is insignificant now but if some poor sod ends up with Acid in their face in a similar circumstance as what happened to you, you’ll regret not reporting it. Not saying they are gearing up for something major like...