You know, I seem to remember thinking that it was a bit odd that nobody recognized the man's name as being the same as the murdered son, but it slipped by in the course of listening.

Your point is totally relevant and justified. Audience members can only suspend so much disbelief in a tale before an oversight (however big or small) in the writing, such as this, is caught and questioned.

Excellent catch and well worth pointing out! Thank you!