Bruises usually heal completely in two weeks. There is no way KW hand bruise is related to this crime.
We do not know the date that was filmed. KW had contacted the FE volunteering to give the interview.
The FE did say the interview was done when the murder seemed to be murder/ suicide. KW met with the FE on several occasions for this episode.
I have had bad bruises take longer than 14 days to heal.
When KW says BS purchased sports cars for him, I for one do not find that at all believable.