我不懂法律，帮你回答一下。

Manslaughter is a legal term for the killing of a human being, in a manner considered by law as less culpable than murder. 

其中包括下面几类，

Voluntary manslaughter，Involuntary manslaughter，Constructive manslaughter，Criminally negligent manslaughter，Vehicular or intoxication manslaughter，Assisted suicide...

梁彼得的罪过比较符合：Criminally negligent manslaughter