What I want to know is what difference it makes whether or not he had a verbal argument or one in text. I could have a knock down drag out verbal argument with my husband in person or in text but it doesn't mean he was the one who killed me if I turned up dead. It could have been the butler in the parlor with the candlestick.
Doesn't law enforcement have more ironclad evidence that this guy killed his wife? If all they have for evidence of motive is a nasty argument in texts on an IPhone, or even a text of apology making the defendent seem nicer, I think either way it's too flimsy for a jury to consider.
Now I could understand the importance of getting to texts saying where a body is buried or a hostage is being kept. But in this particular case I'm not getting why the iPhone is so important. Unless he bludgeoned her to death with it.