(Updated 9-11-2017)
The several television programs under the CSI (Crime Scene Investigation) brand are crime dramas depicting how sophisticated forensic tools are used to solve cases. Because such tools are based on science, they are only as good as the science on which they rest. How good is the science? As the references listed below make plain, much of the forensics depicted in television programs is at best fanciful, and real-life forensics are too often not much better.
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From the 1970s until about 2010, the number of individuals incarcerated in state prisons, federal prisons, and local jails increased dramatically. The main drivers were (1) changes in laws leading to longer, often mandatory, sentences, (2) "truth-in-sentencing" legislation requiring individuals convicted of violent crimes to serve at least 80% of their sentences, and (3) increased use of incarceration for drug-related crimes. Since then, there have been concerted efforts in some jurisdictions to reduce the number of individuals incarcerated.
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Since 1980, the share of the US population that is foreign born has doubled, rising from just over 6% in 1980 to over 12% in 2010. Compounding this demographic shift, the share of the foreign born population of Mexican origin also doubled, leading to a quadrupling of the fraction of US residents who are immigrants from Mexico. A majority of recent immigrants of Mexican origin living in the United states are thought to be undocumented, leading to a contentious policy debate concerning the collateral consequences of this particular type of immigration.
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In the United States, there are several different, but common, definitions of mass shootings. The Congressional Research Service defines mass shootings, as multiple, firearm, homicide incidents, involving 4 or more victims at one or more locations close to one another. The FBI definition is essentially the same. Often there is a distinction made between private and public mass shootings (e.g., a school, place of worship, or a business establishment). Mass shootings undertaken by foreign terrorists are not included, no matter how many people die or where the shooting occurs.
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Recent empirical research has shown that juveniles do not achieve complete psychosocial maturity until post-adolescence and that trying juveniles as adults can be associated with elevated rates of criminal recidivism (Steinberg & Cauffman, 1996). In response to these as well as other concerns, several states including Illinois, Conneticut, Massachusetts, Mississippi, and New Hampshire, have recently raised their legal ages of majority in the hopes of reducing juvenile offending rates.
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