I missed the ages.
Yes, from the mouths of babes...naught. Babies cannot logically point their little fingers, either, and they cannot speak.
They can roar!
Yes, CPS did not know who was telling the truth, so they erred on the side of protecting the children.
Broken ribs could have happened as a result of a fall. From a rather high perch. The four month old? She could have rolled and fell. But, unnoticed?
The one year old? They can barely climb. They could stand and fall from a couch, a parents bed, onto a hard table. But, unnoticed?
The bang and the child's screams would not go unnoticed, had the mother been in the house. Or she did not want to admit it.
More ipso facto, Pour favor.
The OP says that the children are 4 months old and 1 year old. 12-4=8. I doubt that the two children are 8 months apart. This 1 year old child could be 23 months old and still be called a year old.
When my son was 12 months old he could climb on just about anything. By the time he was 24 months old one of his favorite activities was to climb on the tallest thing around him and jump.
There were times when I was in the kitchen checking the cooking food (2-3 minutes & about 10 ft way from him) and he was in the next room... where, as soon as I did not have my eyes on him, he would do things like climb up on a book shelf and jump. There were times when he suffered a bruise for two doing this.
What I learned is that kids can move fast. And some kids like to do things that they are forbidden to do the moment their parent is not right there looking at them, even for 2-3 minutes.
As I explain earlier, his broken bones from this happened when he was a bit older.
I'm not making the judgement that the OP's kid was not abused. I'm not making the point that abuse is not the only scenario under which a child that young can get hurt.
I don't think that the OP is coming back. His post was days ago and he's long gone. So now we are all just making stuff up to talk about with no idea of what really happened.