"If a man had a history of hitting his partner, that in itself was a predictor of murder. But certain kinds of behavior came with even higher chances of death. For instance, if a man choked his partner, she was five times more likely to be killed by him at some point. If he was unemployed, he was four times more likely to kill her. The researchers also found that only 4 percent of homicide victims had ever sought help from a shelter; in a follow-up study, they found that a stay in a safehouse decreased the risk of violent re-assault by 60 percent.
By the end of 2005, the group had developed a series of questions that they called “the screen.” The first three questions concerned the most important predictors of future homicide: Has the abuser used a weapon against you? Has he threatened to kill you? Do you think he might kill you? If the woman answered yes to any of those questions, she “screened in.” If she answered no, but yes to four of the remaining eight questions, again, she was in. Among these were other, less obvious indicators of fatal violence: Has he ever tried to kill himself? Does she have a child that he knows isn’t his?
The officer would then present her with an assessment: Others in your circumstances have been killed; help is available if you want it. If the woman agreed, an officer would dial the local shelter from a police cell phone (to prevent the abuser from finding out about the call) and hand it over."