Articles Published by NIJ

An overview of four common training topics and what the evidence says about their efficacy.

A troubled past and leaked plans are common to those who take part in mass shootings. Most use handguns, NIJ-supported research shows.

A new area of research suggests that schools should have a systematic and coordinated approach in place to gather and process information on threats, respond appropriately, and document the response.

Tip lines make possible confidential reporting of threats and problems and may benefit schools beset by safety and crime threats. More studies are needed on their effectiveness, but a new tip line toolkit instructs schools on how they work.