The consequences of willed ignorance

From Six Reasons the Murder Clearance Rate Is at an All-Time Low by Derek Thompson.  The subheading is For the past 60 years, U.S. detectives have gotten worse at one of the most basic jobs of law enforcement.

In the 1960s, more than 90 percent of all homicides were “cleared” by police, with an arrest or the identification of a dead suspect. But the clearance rate has declined in each of the past six decades. In the most recent data available from the FBI, the clearance rate hit an all-time low of just over 50 percent. That means that about half of all murders in the United States today go unsolved.