Final answer:
The provided materials do not offer a direct answer to the percentage of murders unsolved in 2010, but crime trends indicate unsolved murders are part of broader criminal justice statistics. Specific clearance rate data for homicides in 2010 is needed for a precise answer.
Step-by-step explanation:
The question pertains to the percentage of murders that went unsolved in the year 2010. While the provided materials do not directly give the unsolved murder rate for 2010, one can infer from the general trends in crime rates and societal patterns that unsolved murders are a component of the larger criminal justice statistics.
Considering that crime reporting sources like the National Crime Victimization Report (NCVR) and the Uniform Crime Reports (UCR) can help determine crime trends, and knowing that crime has been on the decline since the 1990s, we can deduce an approach to estimate the unsolved murder rate. To provide a more precise answer, additional data and reports specifically addressing the clearance rates of homicides in 2010 would be needed.
It's important to note the perception of crime can differ from actual crime rates, as surveys suggest that the public believes crime is worsening despite the decline. This is exemplified by the fact that although gun-related crimes have decreased, a majority of Americans in past surveys thought they had increased.