The FBI issued this press release yesterday on its Preliminary Semiannual Uniform Crime Report.
All of the offenses in the violent crime category--murder and non-negligent manslaughter, rape (revised definition), rape (legacy definition), aggravated assault, and robbery--showed increases when data from the first six months of 2016 were compared with data from the first six months of 2015. The number of aggravated assaults increased 6.5 percent, murders increased 5.2 percent, rapes (legacy definition) increased 4.4 percent, rapes (revised definition) rose 3.5 percent, and robbery offenses were up 3.2 percent.We at CJLF will be looking at the data more closely and will report what we find on this blog.* * *In the property crime category, offenses dropped 0.6 percent. Burglaries were down 3.4 percent, and larceny-thefts declined 0.8 percent. However, motor vehicle thefts increased 6.6 percent.

My guess is that two of the causes are:
The Obama Administration's drop in felon gun possession prosecutions and its less than aggressive criminal alien deportation.
Both factors cited by federalist are correct, but the sharp decline in pro-active policing as the result of BLM movement's "cops are racist" narrative, advanced by the President, the Attorney General and the mainstream media is also a factor. As a story in today's NewsScan confirms, cops are not cruising high crime neighborhoods and shaking down punks for drugs and guns anymore. Reported urban arrest rates are down dramatically and the impact of this is tragic. The recently released FBI data found that cities with over one million inhabitants saw a whopping 21.6% increase in murders in the first half of 2016 compared to the first half of 2015, when homicide also jumped in most urban centers after decades of decline.