John Yang:

Judy, Post reporters analyzed data from 47 major U.S. cities. And in a closer examination of homicides in five of those cities, the reporters found that more than a third of the men implicated in a domestic killing were known to be potential threats.

They had a previous restraining order against them or had been convicted of domestic abuse or a violent crime, including murder. And police told The Post reporters that attempted strangulation is a strong indicator that an abusive relationship could turn deadly.

Katie Zezima was the lead reporter of the Post team who traveled around the country on this story, and she is with us now.

Katie, thanks so much for being with me.