Americans are mourning along with victims’ families in the wake of the Aurora movie theater shootings. But what should our feelings be toward the family of James Holmes, the shooting suspect?

Experts who study shooting rampages and killing sprees say we should mourn for them too.

“We have lots of sympathy for the families of the victims, as we should,” said Northeastern University criminologist James Alan Fox, “but we generally don’t have much sympathy at all for the family of the perpetrators — whether their loved one is dead or alive.”