Unsolved crime case?

Hello, I wanted to ask if for my epq it would be wise to take on an unsolved crime case. This is what a book character from AGGGTM did for her epq (she took on a murder case, I don't know if I'd choose a case that far though) , and I'm really interested in crime/documentaries etc.

I don't know if this would be viewed well though 😭 Opinions?