If the baby had blood from nose or mouth then it was squashed to death.
Whether or not it's head was through a hole or not, at this point is irrelevant now, if you are already aware that the holes are a danger.
But getting squashed means the basket is not large enough or baby would have scooted itself away from under mom eventually.
It's still a matter of not enough space, I would get a larger container so this doesn't happen again, as it very well may.
A baby can get layed on by mom, and will squirm and cry but work it's way out. If baby squirms it's way out but hits a dead end wall, then it suffocates.
Whether or not it's head was through a hole or not, at this point is irrelevant now, if you are already aware that the holes are a danger.
But getting squashed means the basket is not large enough or baby would have scooted itself away from under mom eventually.
It's still a matter of not enough space, I would get a larger container so this doesn't happen again, as it very well may.
A baby can get layed on by mom, and will squirm and cry but work it's way out. If baby squirms it's way out but hits a dead end wall, then it suffocates.