Mate, go read what manslaughter is and put the shovel down.
Lack of intent is literally the difference between manslaughter and murder.
If it helps you to conceptualize this better and not berate other posters when you don't have a clear understanding of what that difference is; if someone has 3-4 drinks and drives home 2km from buddies house, hits another car on a back road and they flip into the ditch and die from the trauma, it's manslaughter.
Zero intent. Complete remorse. Recklessness of ones own actions led to the unintentional death of another. Doesn't absolve of legal responsibility and consequences.
Flailing your leg into the sky on hits when literally no other player in hockey does this, could definitely be argued as recklessness of ones actions/body.