Because all of these

因为所有这些家庭
families recently had children in their homes,

最近家里都带过小孩
we believe our unsub is motivated by maternal desire.

我们认为凶手的杀人动机来自母性欲望
Maternal desire is the profound emotional need to mother a baby.

母性欲望是想要抚育孩子的一种复杂情绪
This stems from either the tragic loss of her own child

欲望爆发可能是因为她最近失去了孩子
or the inability to have one at all.

或她根本没有生育能力
This unsub may also fantasize

不明嫌犯可能幻想
that someone else's baby belongs to her,

别人的孩子是她的
and this emotion feels beyond her control.

她已经无法控制这种情绪
A woman who miscarries

流产的女人
sometimes projects onto someone else's baby

有时会将感情投射到别人的孩子身上
and then sets out to take that child.

然后会想带走那个孩子