CAS怎么介入的？总要有理由他们才会介入。这个文章写的不清不楚的。

有可能是打孩子，也有可能是一些其他的奇怪理由。上次有个华人妈妈因为生病住院，家里老人不说英文，所以孩子被CAS骗走了，2年多回不来。

维基上查的：
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Children's Aid Societies have authority under provincial legislation to remove children from homes where they face either a risk of harm, or have experienced harm. Children who cannot remain with caregivers are sometimes placed with other family members ("kin"), family friends ("kith"), or in customary care, which is an option for aboriginal children. In other cases, children can be placed into foster homes or group homes, as well as being adopted.