*Six years old*....that's the key.
I’m not buying it either. Most six year olds can’t tie knots by themselves, and need help fastening their belts. Not to mention needing help tying the laces on their shoes.
Also, most normal six year olds wouldn’t climb into a baby crib willingly. They usually transition to sleeping in a bed before that age. And if a six year old was using a crib as a hiding place, they would most likely hide under the crib, not inside it.
No, I suspect what happened is the poor girl was sent to the crib as punishment. Someone must have tied her inside the crib with a belt around the neck to keep her inside the crib... and as she tried to escape the crib, she accidentally hung herself. This is not likely a suicide. Samantha Kuberski, six years old, was murdered accidentally, either by her parents or perhaps one of her siblings. This is definitely a murder case.
I'm not so sure. Maybe she did not realize the result, but kids emulate what they see often, and often without understanding it. Ours were all putting their movies into the VCR at two, and initially picked up certain emphatic phrases without knowing their meaning (which they had to be untaught--my bad). Little 'pitchers' have big ears, and all that.
I would not be quick to discard other possibilites, either, but children absorb an incredible amount, even if they don't completely understand the far-reaching consequences of their actions.