Yeah, but Lloyd is white.
Yeah, LOL
But it boils down to certain crimes being higher priority than others, and "how much work is this going to be vs chance of success" definitely playing a factor.
Even with the most serious of crimes, the police aren't great, let's be honest. They are often outright useless even with glaringly obvious evidence.
https://www.bbc.com/news/uk-59576717
https://www.theguardian.com/uk-news/2021/dec/10/mets-failings-contributed-to-deaths-of-stephen-ports-victims-inquest-finds
So do I think "evidence has been given to the police" will achieve much? I don't have much confidence, even if it was clear and obvious, they'd still find a way to screw it up.
The police in real life are not at all like the police in detective shows.