I wonder:
How did LE initially interrogate CR, via interpreter or not? It seems to me they didn't have enough time to request for an interpreter but it is likely they have someone capable given the possible makeup of the local workforce.
LE must have run a DNA by now, waiting for CODIS?
CR didn't seem nervous or confused during the initial hearing. I thought he appeared as still angry. Anyway, it seemed to me as if he'd been through such an experience previously or, at least was familiar with the procedure.
What made CR sh** where he eats? Sorry to be graphic but I think a direct and raw analogy is appropriate in this instance. That, plus that CR seemed so forthcoming to LE regarding what happened is it possible he really wanted to get caught, at least subconsciously? No death penalty, life in prison, a prison in which he wouldn't have to work and worry about raising a family and feeding himself. Three hots and a cot. Then again, he want to significant length to hide his crime.
If CR truly is illegal will DHS want to deport him? I think the DA would want for a full prosecution and internment, regardless if Iowans would have to pay for a lifetime of his internment.