Despite advanced technology, far more murders go unsolved now than 50 years ago:
The clearance rate has fallen from 91 percent in 1965 to about 59.4 percent in 2016.
In the same period, the U.S. population increased by 54 million and the homicide rate per 100,00 declined from 7.4 in 1996 to 5.3 in 2016.
Source: How many homicides go unsolved in California and the nation? – Orange County Register