What does the higher clearance rate for non$-$firearm homicides suggest compared to firearm$-$related homicides?

Non$-$firearm homicides are easier to solve due to the complexity of firearm usage.

Firearm homicides tend to be more complex and involve fewer witnesses.

There is more cooperation from witnesses in non$-$firearm homicides.

Non$-$firearm homicides are inherently more violent, leading to better evidence.