There were 23 homicides and 39 nonfatal shootings in Baltimore in May 2014. Through 29 days of May 2015, there were 42 homicides and 104 nonfatal shootings. Gulp. Why are arrests down so sharply? Some cops may fear that criminals have turned more aggressive and confrontational after a year of high-profile allegations of police brutality, from the protests in Ferguson to the assassination of two officers in New York to the riots over Freddie Gray in Baltimore. Jack Dunphy, a cop himself, noted in a piece for PJM last month that crime rates are up in multiple major cities nationwide....