COLUMBUS, Ohio — With tensions running high over the killings of blacks by police, departments around the country are changing policies and procedures to curb the use of deadly force, ease public distrust and protect officers from retaliation.

New York City plans to issue stun guns to hundreds more officers. The Milwaukee department is making crisis-intervention training mandatory. And in Akron, Ohio, police have begun working in pairs on all shifts for their own safety.

Police departments are constantly updating training. But some of the more recent measures have been prompted by rising anger toward police. And in some cases, departments are making sure to let the public know about these changes.

“It’s not a mistake or a coincidence that a lot of these departments are publicizing their training or are perhaps revamping their training guidelines and things like that in the wake of these really high-profile incidents,” said Kami Chavis Simmons, director of the criminal justice program at the Wake Forest University School of Law in North Carolina and a former federal prosecutor in Washington.

Protests, largely peaceful, have flared across the country after grand juries in recent weeks declined to indict white officers in the fatal shooting of 18-year-old Michael Brown in Ferguson, Missouri, and the chokehold death of Eric Garner in New York City. Both men were black and unarmed.