I got the jist of it from someone who didn't see it happen, and after that there was a ton going down at the time that was more urgent.

[He'd have preferred to know, of course, but he knew well enough that there were more immediate concerns at the time. It would have been even better to have heard every single detail from his dad, but.....] Things don't always go as planned. It's no surprise that some details were never mentioned.