The height of the mattress bothers me also. I wonder if Lisa slept with mom and dad.
I think it would be unusual for a baby to die from that height ,but I'm no expert.
I still think a mother would call 911 ,not believing her child was really dead or couldn't be saved. And when was mom distraught ,grieving,beside herself ,trembling in shock,because her baby girl was dead?
Unless the baby died from abuse or murder,I don't believe a mother would not try to get help,even if it had been hours and hours.
It works the other way around,IMO.Parents who abuse or kill their children cover it up to make it look like an accident.They don't cover up accidents by making it look like a kidnapping/murder. JMO
I have said before,any mother who could cover up an accident ,never trying to get the baby help,because they were afraid they would be in trouble,could also hurt that baby on purpose.That kind of mother never cared enough about the baby to begin with. MO