Panic over youth crime in Baltimore is not new; every few years, a string of incidents captures the public’s imagination and leads to calls for police to do something. That is not to say that the recent concern isn’t warranted. City officials say that while overall arrests of youth are down compared to last year, there has been a spike in serious crimes committed by minors. Some of the incidents — assaults, carjackings and armed robberies — are disturbing. It is certainly fair to ask whether the state Department of Juvenile Services could do a better job of monitoring and rehabilitating youth offenders. Creating an undercover unit of young officers and cadets to target youth gangs, as Mr. Davis has done, is a good idea. It is absolutely right that the police and school system should seek to coordinate their efforts to address youth who are prone to violence, as they are starting to do. And there is no question that city officials are right to call on families and communities to do a better job of reining in troubled young people.