So I brought down to the computer the best ears around. ( my wife)
I didn't tell her what the words were,or that they were going to be in Arabic.
She listened several times. I asked her what he said after the OB OB comments she said she couldn't make out the words.
So I asked her what did it sound like , she said ullakbar. - tom
The only thing that would convince me that it isn't a rushed "Allah Akbar" is if the cop(s) who directly engaged the shooter says it wasn't.