The perception (and AFAIK the reality) is that you are far more likely to be mugged if you are wearing visible jewelry or holding a mobile phone. Police do issue warnings about that from time to time.
If Holmes had interviewed Joseph Frederic would he have started off
He was on his way home from a night out with his friends, wearing a wedding ring and carrying a mobile phone.
It's that old thing, I always say. Why were you tempted to wear jewelry and not hide your mobile in your boxer shorts?'
or conclude the interview with
I hope you take your ring off now. Everywhere you go, coming home at night.
?
No, because he would come across as an offensive git if he did. Even if he regularly advises his sons to keep their mobiles hidden in public to reduce their risk of mugging.