Does anyone know why MAP focuses on the clearance rate? It seems to conflate arresting someone with "solving" the murder. I can think of some plausible reasons

Does anyone know why MAP focuses on the clearance rate? It seems to conflate arresting someone with "solving" the murder. I can think of some plausible reasons: practicality (easiest to collect, stable over time), political (if your audience is the police, basing your work on the assumption that they arrest the right guy is probably smart), standardization (is it?), etc. Wikipedia is fairly light, but does link to a pair of articles on the criminal justice conflict vs consensus models, so it seems this is a potential can of worms.