Ghostwheel
Pyrrhonist
I am not sure where IF driving a car came from. I didn't say anything about IF driving a car. (Was that a joke and I missed it?:waitasecI don't think IF knows how to drive a car.
But in all honesty, if there was an intruder, I would think he would be gone by the time the emergency vehicles arrived. Don lived within sight of the Fowlers' front door, so where did the car come from? It couldn't have been parked close to the house, so did the killer walk to his car, and then drive back to the neighborhood to scream to a neighbor?
Anyway, IF not telling his sister and her boyfriend on the phone that Leila had been stabbed tells me there was no intruder. Why would he delay medical care to her?
If someone had gone out the back door or a window (don't know if this is possible), the car could have been parked down the road, in an empty house driveway (happens around here all the time), off the road, etc. The person then could have mixed in with the chaos and just exited out with no one thinking anything odd. (Again, this is how burglars exit around here if an alarm goes off, they dump the stuff, climb a few fences, retrieve their car from elsewhere and calmly drive off.) Besides, where did the car come from in any case? It came from somewhere. And went somewhere.
For your final query about IF not saying Leila was stabbed, maybe at that time he did not know. If he was cowering in a closet or bathroom, he might not have checked on his sister. My two siblings cowered in the bathroom when shot rang out in our neighborhood, so I know it happens. I could have been laying dead on the floor and they would have had no idea. They didn't come out until they heard the sirens stop across the street.