A social worker could have explained to the mother and toddler that drowning is a pleasant way to go and convinced them to just give in to the feeling.
Saves money, no dangerous cops who might shoot a black bystander, less risk to EMTs and firefighters ...
I really dislike what you posted, but I agree.
Like Colonel Jack O’Neill was so fond of saying in the long-running Stargate series... “Do ya see the irony?”