I think a lot of kids don't see their parent as allegedly being a killer.
I remember before and after Borce Ristevski's guilty manslaughter plea, their daughter didn't think her dad was guilty of killing her mother, then 'didn't want to think about it' after he pleaded guilty.
At the time, I looked up a bunch of articles about various murders where the child/ren thought and still think their convicted parent is innocent. (I also saw articles where the child/ren had nothing further to do with their murderous parent.)
Daughter stands by her father after he pleads guilty to killing her mother | 60 Minutes Australia