I would immediately contact an attorney and also, myself, ask for the tape of your screening.
If the tape has no audio, as I presume it does not, I'd find a lip reader who might be able to interpret the tape for you and your attorney.
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Actually, I'm going to revise that. I would advise filing an assault complaint with the Phoenix PD and doing it immediately, even if you are in Portland right now. Demand the tape of your screening when you file that complaint.