Culpable homicide is a big, grown-up word that basically means someone did something really bad that hurt or killed someone else, but they didn't mean to do it on purpose. It's like if you were playing with a toy and accidentally hit your friend, and they got hurt - you didn't mean to hurt them, but it still happened because you weren't being careful enough.
When a grown-up does something like that, and it results in someone getting hurt or killed, they might be charged with culpable homicide. This is different from murder, which means the person did mean to hurt or kill someone on purpose. Culpable homicide is still a very serious charge, though, because it means the grown-up was careless or didn't think about the consequences of their actions enough.
So, when someone is charged with culpable homicide, it means they did something that caused someone else to get hurt or die, but they didn't mean to do it on purpose. It's like a mistake that is still very bad and can have serious consequences for everyone involved.