system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: the concept of a statute of limitations on violent crimes, why? Shouldn’t they always be eligible for persecution?
gpt
The main reason is to ensure the best evidence is presented in any case.
The longer a case goes on the more unreliable the evidence becomes, ie witness statements become warped with memory, digital data gets lost, files get misplaced.

It depends on the country as well, mostly minor and civil cases here in the UK have limitations to ensure defendants have an accurate case bought against them.