Two out of every three mass shootings analyzed in that paper were linked to domestic violence, said Lisa Geller, the lead author of the paper and the state affairs manager for the nonprofit affiliate of the Coalition to Stop Gun Violence. Her team looked at shootings where four or more people died, not including the shooter.

Not only was their a frequent intersection between domestic violence and mass shootings, Geller said, but when the two intersected, it typically raised the risk that someone would die. On average, her research team found, two out of six people will survive a mass shooting if it’s not related to domestic violence, but if it is, only one in six made it out alive.

“The intent behind a perpetrator who kills a family member or intimate partner may be different from someone who perpetrates some of these high-profile public mass shootings that we hear about a lot on the news,” Geller said. “This intent to make sure that a family or intimate partner is killed, may mean that they are more likely to actually die from that gunshot.”