Can a river have a legal identity as if it were a human being?
If it's in New Zealand it can. The Whanganui River has been recognised by a new law, as "an indivisible and living whole from the mountains to the sea". The law is a recognition of the relationship between the Maori Whanganui iwi (or tribe) and the river, and settles a dispute that has been going on since the 1870s.
What constitutes an offence of corporate manslaughter? Who can be prosecuted for it and what are the punishments?