Night of the 4th Cathy testified he was at home and (paraphrased) there was nothing unusual about her calling him six times for three hours from 6 pm to 9 pm. I don't recall what she said about him calling her back at 9.32 pm from 20 miles away, I guess she didn't remember, she only remembered him being there and not picking up the 8.28 pm call from Joseph. But to her credit she did concede she told detectives that she could have sworn this all happened on a Friday night, when we know the 4th was a Thursday.
So there's his alibi for the 4th.
Oh and jury heard the jailhouse recording (2019) and the wiretapped call (2014) where they discussed it all.
For the 6th his sister backtracked on what she told Sgt Smith in 2014, which was that he hadn't been to her house in 5 years, which strangely tallied with his July 2009 phone pings.