Officer Dwyone Jones grinned broadly as he approached a young boy on a porch holding a colorful water gun.
"Getting ready for summertime, huh?" the rookie officer asked, drawing a quick, shy smile from the boy.
One year to the day since the death of Freddie Gray, it was the sort of interaction — a friendly cop on patrol engaging a local kid — that police commanders see as critical to bridging the divide between police and the community that was exposed by the rioting, looting and arson following Gray's death.
A week later, on the anniversary of the worst of the unrest, two...